(a) The Exchange shall be open for business as provided within General 3, Rule 1030.

(b) Except for unusual conditions as may be determined by the Board, hours during which transactions in options on a narrow-based index, as defined in Options 4A, Section 2, and individual stocks may be made on the Exchange shall correspond to the normal business days and hours for business established by the markets currently trading the stocks underlying Exchange options.

(c) Options on Exchange-Traded Fund Shares, as defined in Options 4, Section 3 may be traded on the Exchange until 4:15 p.m. each business day.

(d) Options on a broad-based index, as defined in Options 4A, Section 2 may be traded on the Exchange until 4:15 p.m. each business day.

(e) Options on Index-Linked Securities, as defined in Options 4, Section 3 may be traded on the Exchange until 4:15 p.m. each business day.

Adopted July 8, 2019 (SR-MRX-2019-15); amended Mar. 8, 2022 (SR-MRX-2022-03), operative Apr. 7, 2022.

(a) Units of Trading. The unit of trading in each series of options traded on the Exchange shall be the unit of trading established for that series by the Clearing Corporation pursuant to the Rules of the Clearing Corporation and the agreements of the Exchange with the Clearing Corporation.

(b) General. Except as provided in paragraph (b), orders and quotations shall be expressed in terms of dollars per unit of the underlying security. For example, a bid of "5" shall represent a bid of $500 for an options contract having a unit of trading consisting of 100 shares of an underlying security, or a bid of $550 for an options contract having a unit of trading consisting of 110 shares of an underlying security.

(c) Special Cases. Orders and quotations for an options contract for which the Exchange has established an adjusted unit of trading in accordance with this Rule shall be expressed in terms of dollars per 1/100 part of the total securities and/or other property constituting such adjusted unit of trading. For example, an offer of "3" shall represent an offer of $300 for an options contract having a unit of trading consisting of 100 shares of an underlying security plus ten (10) rights.

[Adopted July 8, 2019 (SR-MRX-2019-15); amended March 10, 2020 (SR-MRX-2020-07), operative April 9, 2020.]

(a) The following minimum quoting increments shall apply to options contracts traded on the Exchange:

(1) if the options contract is trading at less than $3.00 per option, $.05;

(2) if the options contract is trading at $3.00 per option or higher, $.10; and

(3) For options contracts traded pursuant to the Penny Interval Program as described in Supplementary Material .01 to Options 3, Section 3:

(A) one cent ($0.01) for all options contracts in QQQ, SPY, and IWM;

(B) one cent ($0.01) for all other options contracts included in the Penny Interval Program that are trading at less than $3.00; and

(C) five cents ($0.05) for all other options contracts included in the Penny Interval Program that are trading at or above $3.00.

(b) Minimum trading increments for dealings in options contracts other than those specified in paragraph (a) may be fixed by the Exchange from time to time for options contracts of a particular series.

(c) Notwithstanding the above, the Exchange may trade in the minimum variation of the primary market in the underlying security.

Supplementary Material to Options 3, Section 3

.01 Requirements for Penny Interval Program. The Exchange will list option classes for the Penny Interval Program (“Penny Program”) with minimum quoting requirements (“penny increments”) of one cent ($0.01) and five cents ($0.05), as set forth in Options 3, Section 3(a)(3)(A) - (C). The list of the option classes included in the Penny Program will be announced by the Exchange via Options Trader Alert and published by the Exchange on its website.

(a) Initial Selection. On the first trading day of the third full calendar month after April 1, 2020, the Penny Program will apply only to the 363 most actively traded multiply listed option classes, based on OCC’s National Cleared Volume in the six full calendar months ending in the month of approval, that (i) currently quote in penny increments, or (ii) overlie securities priced below $200, or any index at an index level below $200. Eligibility for inclusion in the Penny Program will be determined at the close of trading on the monthly Expiration Friday of the second full month following April 1, 2020.

(b) Annual Review. Commencing in December 2020 and each December thereafter, OCC will rank all multiply listed option classes based on National Cleared Volume for the six full calendar months from June 1 through November 30 for determination of the most actively traded option classes. 

(1) Addition to the Penny Program. Based on the Annual Review, any option class not in the Penny Program that is among the 300 most actively traded multiply listed option classes overlying securities priced below $200, or an index at an index level below $200, will be added to the Penny Program on the first trading day of January.

(2) Removal from the Penny Program. Except as provided in (c), (d), (e) and (f) below, based on the Annual Review, any option class in the Penny Program that falls outside the 425 most actively traded multiply listed option classes will be removed from the Penny Program on the first trading day of April. 

(c) Newly listed Option Classes. The Exchange may add to the Penny Program a newly listed option class provided that (i) it is among the 300 most actively traded multiply listed option classes, as ranked by National Cleared Volume at OCC, in its first full calendar month of trading and (ii) the underlying security is priced below $200 or the underlying index is at an index level below $200. Any option class added under this provision will be added on the first trading day of the month after it qualifies and will remain in the Penny Program for one full calendar year, after which it will be subject to the Annual Review stated in section (b) above. 

(d) Classes with Significant Growth in Activity. The Exchange may add any option class to the Penny Program, provided that (i) it is among the 75 most actively traded multiply listed option classes, as ranked by National Cleared Volume at OCC, in the past six full calendar months of trading and (ii) the underlying security is priced below $200 or the underlying index is at an index level below $200. Any option class added under this provision will be added on the first trading day of the second full month after it qualifies and will remain in the Penny Program for the rest of the calendar year, after which it will be subject to the Annual Review stated in section (b) above.

(e) Corporate Actions.  If a corporate action involves one or more option classes in the Penny Program, all adjusted and unadjusted series of the option class will be included in the Penny Program. Any new option class added to the Penny Program under this provision will remain in the Penny Program for at least one full calendar year, after which it will be subject to the Annual Review stated in section (b) above.  

(f) Delisted or Ineligible Option Classes. Any series in an option class participating in the Penny Program in which the underlying security has been delisted, or are identified by OCC as ineligible for opening customer transactions, will continue to quote pursuant to the terms of the Penny Program until all such options have expired.

.02 Notwithstanding any other provision of this Rule, the Exchange will permit foreign currency options to be quoted and traded in one-cent increments.

.03 Notwithstanding any other provision of this Rule, complex strategies may be traded in the increments described in Options 3, Section 14(c)(1).

[Adopted July 8, 2019 (SR-MRX-2019-15); amended December 12, 2019 (SR-MRX-2019-26); amended March 10, 2020 (SR-MRX-2020-07), operative April 9, 2020; amended June 23, 2020 (SR-MRX-2020-13).]

(a) All bids or offers made and accepted on the Exchange in accordance with the Rules shall constitute binding contracts, subject to applicable requirements of the By-Laws and the Rules and the Rules of the Clearing Corporation.

(b) Quotes are subject to the following requirements and conditions:

(1) Market Makers may generate and submit option quotations.

(2) The System shall time-stamp a quote which shall determine the time ranking of the quote for purposes of processing the quote.

(3) Market Makers may enter bids and/or offers in the form of a two-sided quote. Only one quote may be submitted at a time for an option series. Quotes may be submitted as a bulk message.

(i) A “bulk message” means a single electronic message submitted to the Exchange which may contain a specified number of quotations as designated by the Exchange. The bulk message, submitted via SQF, may enter, modify, or cancel quotes. Bulk messages are handled by the System in the same manner as it handles a single quote message.

(4) The System accepts quotes for the Opening Process as specified in Options 3, Section 8.

(5) Firm Quote. Where quotes in options on another market or markets are subject to relief from the firm quote requirement set forth in the Rule 602 of Regulation NMS under the Exchange Act, orders and quotes will receive an automatic execution at or better than the NBBO based on the best bid or offer in markets whose quotes are not subject to such relief. Such determination may be made by way of notification from another market that its quotes are not firm or are unreliable; administrative message from the Option Price Reporting Authority ("OPRA"); quotes received from another market designated as "not firm" using the appropriate indicator; and/or telephonic or electronic inquiry to, and verification from, another market that its quotes are not firm. The Exchange shall maintain a record of each instance in which another exchange's quotes are excluded from the Exchange's calculation of NBBO, and shall notify such other exchange that its quotes have been so excluded. Where quotes in options on another market or markets previously subject to relief from the firm quote requirement set forth in the Quote Rule are no longer subject to such relief, such quotations will be included in the calculation of NBBO for such options. Such determination may be made by way of notification from another market that its quotes are firm; administrative message from OPRA; and/or telephonic or electronic inquiry to, and verification from, another market that its quotes are firm.

(6) Trade-Through Compliance and Locked or Crossed Markets. A quote will not be executed at a price that trades through another market or displayed at a price that would lock or cross another market. If, at the time of entry, a quote would cause a locked or crossed market violation or would cause a trade-through violation, it will be re-priced to the current national best offer (for bids) or the current national best bid (for offers) as non-displayed, and displayed at one minimum price variance above (for offers) or below (for bids) the national best price, or immediately cancelled, as configured by the Member.

(7) The System automatically executes eligible quotes using the Exchange's displayed best bid and offer (“BBO”) or the Exchange’s non-displayed order book (“internal BBO”) if the best bid and/or offer on the Exchange has been repriced pursuant to Options 3, Section 5(d) below and subsection (6) above.

(8) Quotes submitted to the System are subject to the following: minimum increments provided for in Options 3, Section 3 and risk protections provided for in Options 3, Section 15.

(c) Quotes will be displayed in the System as described in Options 3, Section 23.

Adopted July 8, 2019 (SR-MRX-2019-15); amended September 17, 2019 (SR-MRX-2019-020), operative October 17, 2019; amended Sep. 9, 2022 (SR-MRX-2022-16), operative Nov. 7, 2022; amended Sep. 30, 2022 (SR-MRX-2022-18), operative Nov. 7, 2022.

(a) Members can enter orders into the System, subject to the following requirements and conditions:

(1) Members shall be permitted to transmit to the System multiple orders at a single as well as multiple price levels.

(2) The System accepts orders beginning at a time specified by the Exchange and communicated on the Exchange's web site.

(3) The System shall time-stamp an order which shall determine the time ranking of the order for purposes of processing the order.

(4) Orders submitted to the System are subject to the following: minimum increments provided for in Options 3, Section 3, risk protections provided for in Options 3, Section 15, and the restrictions of any order type as provided for in Options 3, Section 7. Orders may execute at multiple prices.

(5) Nullification by Mutual Agreement. Trades may be nullified if all parties participating in the trade agree to the nullification. In such case, one party must notify the Exchange and the Exchange promptly will disseminate the nullification to OPRA. It is considered conduct inconsistent with just and equitable principles of trade for a party to use the mutual adjustment process to circumvent any applicable Exchange rule, the Act or any of the rules and regulations thereunder.

(b) NBBO Price Protection. Orders, other than Intermarket Sweep Orders (as defined in Options 5, Section 1(h)), will not be automatically executed by the System at prices inferior to the NBBO (as defined in Options 5, Section 1(j)).

(1) There is no NBBO price protection with respect to any other market whose quotations are Non-Firm (as defined in Options 5, Section 1(k)).

(c) The System automatically executes eligible orders using the Exchange's displayed best bid and offer ("BBO") or the Exchange’s non-displayed order book (“internal BBO”) if the best bid and/or offer on the Exchange has been repriced pursuant to subsection (d) below and Options 3, Section 4(b)(6) above.

(d) Trade-Through Compliance and Locked or Crossed Markets. An order will not be executed at a price that trades through another market or displayed at a price that would lock or cross another market. An order that is designated by the Member as routable will be routed in compliance with applicable Trade-Through and Locked and Crossed Markets restrictions. An order that is designated by a Member as non-routable will be re-priced in order to comply with applicable Trade-Through and Locked and Crossed Markets restrictions.  If, at the time of entry, an order that the entering party has elected not to make eligible for routing would cause a locked or crossed market violation or would cause a trade-through violation, it will be re-priced to the current national best offer (for bids) or the current national best bid (for offers) as non-displayed, and displayed at one minimum price variance above (for offers) or below (for bids) the national best price.

(e) Orders will be displayed in the System as described in Options 3, Section 23.

Adopted July 8, 2019 (SR-MRX-2019-15); amended September 17, 2019 (SR-MRX-2019-020), operative October 17, 2019; amended Sep. 9, 2022 (SR-MRX-2022-16), operative Nov. 7, 2022; amended Sep. 30, 2022 (SR-MRX-2022-18), operative Nov. 7, 2022.

(a) Each Market Maker shall communicate to the Exchange its bid and offers in accordance with the requirements of Rule 602 of Regulation NMS under the Exchange Act and the Rules of the Exchange.

(b) The Exchange will disseminate to quotation vendors the highest bid and the lowest offer, and the aggregate quotation size associated therewith that is available to Public Customer Orders, in accordance with the requirements of Rule 602 of Regulation NMS under the Exchange Act.

(c) Unusual Market Conditions.

(1) An Exchange official designated by the Board shall have the power to determine that the level of trading activities or the existence of unusual market conditions is such that the Exchange is incapable of collecting, processing, and making available to quotation vendors the data for the option in a manner that accurately reflects the current state of the market on the Exchange. Upon making such a determination, the Exchange shall designate the market in such option to be "fast." When a market for an option is declared fast, the Exchange will provide notice that its quotations are not firm by appending an appropriate indicator to its quotations.

(2) If a market is declared fast, designated Exchange officials shall have the power to: (i) direct that one or more trading rotations be employed pursuant to Options 3, Section 8; (ii) suspend the minimum size requirement of Options 2, Section 5(b); or (iii) take such other actions as are deemed in the interest of maintaining a fair and orderly market.

(3) The Exchange will monitor the activity or conditions that caused a fast market to be declared, and a designated Exchange official shall review the condition of such market at least every thirty (30) minutes. Regular trading procedures shall be resumed by the Exchange when a designated Exchange official determines that the conditions supporting a fast market declaration no longer exist. The Exchange will provide notice that its quotations are once again firm by removing the indicator from its quotations.

(4) If the conditions supporting a fast market declaration cannot be managed utilizing one or more of the procedures described above, then a designated Exchange official shall halt trading in the class or classes so affected.

Adopted July 8, 2019 (SR-MRX-2019-15).

The Exchange may determine to make certain order types and time-in-force, respectively, available on a class or System basis.

(a) Market Orders. A Market Order is an order to buy or sell a stated number of options contracts that is to be executed at the best price obtainable when the order reaches the Exchange.  Members can designate that their Market Orders not executed after a pre-established period of time, as established by the Exchange, will be cancelled back to the Member, once an options series has opened for trading. Market Orders on the order book would be immediately cancelled if an options series is halted, provided the Member designated the cancellation of Market Orders.

(b) Limit Orders. A limit order is an order to buy or sell a stated number of options contracts at a specified price or better.

(1) Marketable Limit Orders. A marketable limit order is a limit order to buy (sell) at or above (below) the best offer (bid) on the Exchange.

(2) Fill-or-Kill Orders. A fill-or-kill order is a limit order that is to be executed in its entirety as soon as it is received and, if not so executed, treated as cancelled.

(3) Intermarket Sweep Orders. An Intermarket Sweep Order (ISO) is a limit order that meets the requirements of Options 5, Section 1(h). Orders submitted to the Exchange as ISO are not routable and will ignore the ABBO and trade at allowable prices on the Exchange.  ISOs must have a TIF designation of IOC. ISOs may not be submitted during the Opening Process. ISOs may be entered on the single leg order book or into the Facilitation Mechanism, Solicited Order Mechanism, or Price Improvement Mechanism, pursuant to Supplementary Material .06 and .07 to Options 3, Section 11, and Supplementary Material .08 to Options 3, Section 13.

(c) All-Or-None Orders. An All-Or-None (“AON”) Order is a limit or market order that is to be executed in its entirety or not at all. An AON Order may only be entered as an Immediate-or-Cancel Order. AON Orders will only execute against multiple, aggregated orders if the executions would occur simultaneously.  AON Orders may not be submitted during the Opening Process.

(d) Stop Orders. A stop order is an order that becomes a market order when the stop price is elected. A stop order to buy is elected when the option is bid or trades on the Exchange at, or above, the specified stop price. A stop order to sell is elected when the option is offered or trades on the Exchange at, or below, the specified stop price.  A Stop Order shall be cancelled if it is immediately electable upon receipt.  Stop Orders may only be entered through FIX. A Stop Order shall not be elected by a trade that is reported late or out of sequence or by a Complex Order trading with another Complex Order.

(e) Stop Limit Orders A stop limit order is an order that becomes a limit order when the stop price is elected. A stop limit order to buy is elected when the option is bid or trades on the Exchange at, or above, the specified stop price. A stop limit order to sell becomes a sell limit order when the option is offered or trades on the Exchange at, or below, the specified stop price. A Stop Limit Order shall be cancelled if it is immediately electable upon receipt.  Stop Limit Orders may only be entered through FIX. A Stop Limit Order shall not be elected by a trade that is reported late or out of sequence or by a Complex Order trading with another Complex Order.

(f) Cancel and Replace Orders. Cancel and Replace Orders shall mean a single message for the immediate cancellation of a previously received order and the replacement of that order with a new order. If the previously placed order is already filled partially or in its entirety, the replacement order is automatically canceled or reduced by the number of contracts that were executed. The replacement order will retain the priority of the cancelled order, if the order posts to the Order Book, provided the price is not amended or size is not increased. In the case of Reserve Orders, the replacement order will retain the priority of the cancelled order, if the order posts to the Order Book, provided the price is not amended or size (displayed and non-displayed) is not changed.  If the replacement portion of a Cancel and Replace Order does not satisfy the System’s price or other reasonability checks (e.g. Options 3, Section 15(a)(1)(A) and Options 3, Section 15(a)(1)(B)) the existing order shall be cancelled and not replaced.

(g) Reserve Orders. A Reserve Order is a limit order that contains both a displayed portion and a non-displayed portion. Market Makers may not enter Reserve Orders pursuant to Options 2, Section 6.

(1) Both the displayed and non-displayed portions of a Reserve Order are available for potential execution against incoming marketable orders. A non-marketable Reserve Order will rest on the order book.

(2) The displayed portion of a Reserve Order shall be ranked at the specified limit price and the time of order entry.

(3) The displayed portion of a Reserve Order will trade in accordance with Options 3, Section 10(c)(1)(A) for Priority Customer Orders, and Options 3, Section 10(c)(1)(E) for non- Priority Customer Orders.

(4) Reserve Orders may be entered with an instruction for the displayed portion of the order to be refreshed: (A) upon full execution of the displayed portion or upon any partial execution; and (B) up to the initial size of the displayed portion or with a random refresh quantity within a range determined by the Member.

(5) When the displayed portion of a Reserve Order is decremented, either in full or in part, it shall be refreshed from the non-displayed portion of the resting Reserve Order. If the displayed portion is refreshed in part, the new displayed portion shall include the previously displayed portion. Upon any refresh, the entire displayed portion shall be ranked at the specified limit price and obtain a new time stamp, i.e., the time that the new displayed portion of the order was refreshed. The new displayed portion will trade in accordance with Options 3, Section 10(c)(1)(A) for Priority Customer Orders, and Options 3, Section 10(c)(1)(E) for non-Priority Customer Orders.

(6) The initial non-displayed portion of a Reserve Order rests on the order book and is ranked based on the specified limit price and time of order entry. Thereafter, non-displayed portions, if any, always obtain the same time stamp as that of the new displayed portion in paragraph (5) above. The non-displayed portion of any Reserve Order is available for execution only after all displayed interest has been executed. The non-displayed portion of any Reserve Order will trade in accordance with Options 3, Section 10(c)(1)(A) for Priority Customer Orders, and Options 3, Section 10(c)(1)(E) for non-Priority Customer Orders.

(h) Attributable Order. An Attributable Order is a market or limit order which displays the user firm ID for purposes of electronic trading on the Exchange. Use of Attributable Orders is voluntary. Attributable Orders may not be available for all Exchange Systems. The Exchange will issue an Options Regulatory Alert specifying the Systems for which the Attributable Order type shall be available.

(i) Customer Cross Orders. A Customer Cross Order is comprised of a Priority Customer Order to buy and a Priority Customer Order to sell at the same price and for the same quantity. Such orders will trade in accordance with Options 3, Section 12(a).

(j) Qualified Contingent Cross Order. A Qualified Contingent Cross (“QCC”) Order is comprised of an originating order to buy or sell at least 1000 contracts that is identified as being part of a qualified contingent trade, as that term is defined in Supplementary Material .01 below, coupled with a contra-side order or orders totaling an equal number of contracts. QCC Orders will trade in accordance with Options 3, Section 12(c). QCC Orders may only be entered through FIX.

(k) Legging Orders. A Legging Order is a Limit Order on the single-leg limit order book in an individual series that represents one leg of a two-legged Complex Options Order that is to buy or sell an equal quantity of two options series resting on the Exchange's Complex Order Book. Legging Orders are firm orders that are included in the Exchange's displayed best bid or offer. Legging Orders are not routable and have a TIF of Day.

The System will evaluate whether Legging Orders may be generated (1) when a Complex Options Order enters the Complex Order Book, and (2) after a time interval (to be determined by the Exchange, not to exceed 1 second) when the NBBO or Exchange best bid or offer in any component of a Complex Options Order changes.  The Exchange may determine to limit the number of Legging Orders generated on an objective basis and may determine to remove existing Legging Orders in order to maintain a fair and orderly market in times of extreme volatility or uncertainty. Legging Orders are treated as having no Priority Customer capacity on the single-leg order book, regardless of being generated from Priority Customer Complex Options Orders.

(1) Generation of Legging Orders. A Legging Order may be automatically generated for one or both leg(s) of a Complex Options Order resting on top of the Complex Order Book at a price: (i) that matches or improves upon the best displayed bid or offer on the single-leg limit order book; and (ii) at which the net price can be achieved when the other leg is executed against the best displayed bid or offer on the single-leg limit order book, excluding other Legging Orders. Legging Orders will be generated and executed in the minimum increment for that options series.

(2) When Legging Orders Will Not Be Generated. A Legging Order will not be generated: (i) at a price that locks or crosses the best bid or offer of another exchange, (ii) if there is a complex auction on either side in the Complex Options Strategy, or a single-leg auction on either side in any component of the Complex Options Strategy, or a Posting Period in progress on the same side in the series, pursuant to Options 3, Section 15 regarding Acceptable Trade Range; (iii) if the price of the leg(s) of a Complex Options Order is outside of the price limits described in Options 3, Section 16(a); (iv) if there is already a Legging Order in that options series on the same side of the market at the same price; or (v) for Complex Orders with 2 option legs, where both legs are buying or both legs are selling and both legs are calls or both legs are puts, as described in Options 3, Section 14(d)(3)(A); or (vi) if the Exchange has not opened; or a particular option series has not opened or such options series is halted.

(3) Execution of Legging Orders. A Legging Order is executed only after all other executable orders (including any non-displayed size) and quotes at the same price are executed in full. When a legging order is executed, the other leg of the Complex Options Order will be automatically executed against the displayed best bid or offer on the Exchange and any other Legging Order not executed as part of the Complex Options Order will be removed. Two Legging Orders related to the same Complex Options Order can be generated, and both can execute as part of the execution of a particular Complex Options Order.

(4) Removal of Generated Legging Orders. A Legging Order is automatically removed from the single-leg limit order book if: (i) the price of the Legging Order is no longer at the displayed best bid or offer on the single-leg limit order book or is at a price that locks or crosses the best bid or offer of another exchange, (ii) execution of the Legging Order would no longer achieve the net price of the Complex Options Order when the other leg is executed against the best displayed bid or offer on the single-leg limit order book, excluding other Legging Orders, (iii) the Complex Options Order is executed in full or in part on the Complex Order Book, (iv) the Complex Options Order is cancelled or modified, (v) the price of the leg(s) of a Complex Options Order is outside of the price limits described in Options 3, Section 16(a), (vi) the System initiates a complex auction on either side in the Complex Options Strategy, or the System initiates a single-leg auction on either side in any component of the Complex Options Strategy, or (vii) a Legging Order is generated by a different Complex Order in the same leg at a better price or the same price for a participant with a higher price priority.

(l) Preferenced Order. A Preferenced Order is as described in Options 2, Section 10.

(m) Reserved.

(n) Add Liquidity Order. An Add Liquidity Order is a limit order that is to be executed in whole or in part on the Exchange (i) only after being displayed on the Exchange's limit order book; and (ii) without routing any portion of the order to another market center. Members may specify whether an Add Liquidity Order shall be cancelled or re-priced to the minimum price variation above the national best bid price (for sell orders) or below the national best offer price (for buy orders) if, at the time of entry, the order (i) is executable on the Exchange; or (ii) the order is not executable on the Exchange, but would lock or cross the national best bid or offer. If at the time of entry, an Add Liquidity Order would lock or cross one or more non-displayed orders or quotes on the Exchange, the Add Liquidity Order shall be cancelled or re-priced to the minimum price variation above the best non-displayed bid price (for sell orders) or below the best non-displayed offer price (for buy orders). Notwithstanding the aforementioned, if an Add Liquidity Order would not lock or cross an order or quote on the System but would lock or cross the NBBO, the order will be handled pursuant to Options 3, Section 5(d). An Add Liquidity Order will be ranked in the Exchange's limit order book in accordance with Options 3, Section 10. Add Liquidity Orders may only be submitted when an options series is open for trading.

(o) Reserved.

(p) Reserved.

(q) Reserved.

(r) Reserved.

(s) Reserved.

(t) Reserved.

(u) Opening Sweep. An Opening Sweep is a one-sided order entered by a Market Maker through SQF for execution against eligible interest in the System during the Opening Process. This order type is not subject to any protections listed in Options 3, Section 15, except for Automated Quotation Adjustments and Market Wide Risk Protection. The Opening Sweep will only participate in the Opening Process pursuant to Options 3, Section 8(b)(1) and will be cancelled upon the open if not executed.

(v) Block Order. A Block Order is an order entered into the Block Order Mechanism as described in Options 3, Section 11(a).

(w) Facilitation Order. A Facilitation Order is an order entered into the Facilitation Mechanism as described in Options 3, Section 11(b).

(x) SOM Order. A SOM Order is an order entered into the Solicited Order Mechanism as described in Options 3, Section 11(d).

(y) PIM Order. A PIM Order is an order entered into the Price Improvement Mechanism as described in Options 3, Section 13(a).

(z) Reserved.

Supplementary Material to Options 3, Section 7

.01 A "qualified contingent trade" is a transaction consisting of two or more component orders, executed as agent or principal, where:

(a) At least one component is an NMS Stock, as defined in Rule 600 of Regulation NMS under the Exchange Act;

(b) all components are effected with a product or price contingency that either has been agreed to by all the respective counterparties or arranged for by a broker-dealer as principal or agent;

(c) the execution of one component is contingent upon the execution of all other components at or near the same time;

(d) the specific relationship between the component orders (e.g., the spread between the prices of the component orders) is determined by the time the contingent order is placed;

(e) the component orders bear a derivative relationship to one another, represent different classes of shares of the same issuer, or involve the securities of participants in mergers or with intentions to merge that have been announced or cancelled; and

(f) the transaction is fully hedged (without regard to any prior existing position) as a result of other components of the contingent trade.

.02 Time in Force. The term “Time in Force” or “TIF” shall mean the period of time that the System will hold an order for potential execution, and shall include:

(a) Day. An order to buy or sell entered with a TIF of “DAY,” which, if not executed, expires at the end of the day on which it was entered. All orders by their terms are Day orders unless otherwise specified. Day orders may be entered through FIX or OTTO.

(b) Good-Till-Canceled. An order to buy or sell entered with a TIF of “GTC” that remains in force until the order is filled, canceled or the option contract expires; provided, however, that GTC orders will be canceled in the event of a corporate action that results in an adjustment to the terms of an option contract. GTC orders may be entered through FIX.

(c) Good-Till-Date. An order to buy or sell entered with a TIF of “GTD,” which, if not executed, will be cancelled at the sooner of the end of the expiration date assigned to the order, or the expiration of the series; provided, however, that GTD orders will be canceled in the event of a corporate action that results in an adjustment to the terms of an option contract. GTD orders may be entered through FIX.

(d) Immediate-or-Cancel. An order entered with a TIF of “IOC” that is to be executed in whole or in part upon receipt. Any portion not so executed is to be treated as cancelled.

(1) Orders entered with a TIF of IOC are not eligible for routing.

(2) IOC orders may be entered through FIX, OTTO or SQF, provided that an IOC order entered by a Market Maker through the SQF protocol will not be subject to the (A) Order Price Protection, Market Order Spread Protection, and Size Limitation Protection as defined in Options 3, Section 15(a)(1)(A), (1)(B), and (2)(B) respectively, for single leg orders, or (B) Complex Order Price Protection as defined in Options 3, Section 16(c)(1) for Complex Orders.

(3) Block Orders, Facilitation Orders, Complex Facilitation Orders, SOM Orders, Complex SOM Orders, PIM Orders, Complex PIM Orders, QCC Orders, QCC Complex Orders, Customer Cross Orders, and Customer Cross Complex Orders are considered to have a TIF of IOC. By their terms, these orders will be: (1) executed either on entry or after an exposure period, or (2) cancelled.

(e) Opening Only. An Opening Only (“OPG”) order is entered with a TIF of “OPG.” This order can only be executed in the Opening Process pursuant to Options 3, Section 8. This order type is not subject to any protections listed in Options 3, Section 15, except Size Limitation and Market Wide Risk Protection. Any portion of the order that is not executed during the Opening Process is cancelled. OPG Orders may not route.

.03 The Exchange offers Members the following protocols for entering orders and quotes respectively:

(a) "Financial Information eXchange" or "FIX" is an interface that allows Members and their Sponsored Customers to connect, send, and receive messages related to orders and auction orders to the Exchange. Features include the following: (1) execution messages; (2) order messages; (3) risk protection triggers and cancel notifications; and (4) post trade allocation messages.

(b) "Ouch to Trade Options" or "OTTO" is an interface that allows Members and their Sponsored Customers to connect, send, and receive messages related to orders, auction orders, and auction responses to the Exchange. Features include the following: (1) options symbol directory messages (e.g., underlying and complex instruments); (2) system event messages (e.g., start of trading hours messages and start of opening); (3) trading action messages (e.g., halts and resumes); (4) execution messages; (5) order messages; (6) risk protection triggers and cancel notifications; (7) auction notifications; (8) auction responses; and (9) post trade allocation messages.

(c) "Specialized Quote Feed" or "SQF" is an interface that allows Market Makers to connect, send, and receive messages related to quotes, Immediate-or-Cancel Orders, and auction responses to the Exchange. Features include the following: (1) options symbol directory messages (e.g., underlying and complex instruments); (2) system event messages (e.g., start of trading hours messages and start of opening); (3) trading action messages (e.g., halts and resumes); (4) execution messages; (5) quote messages; (6) Immediate-or-Cancel Order messages; (7) risk protection triggers and purge notifications; (8) opening imbalance messages; (9) auction notifications; and (10) auction responses. The SQF Purge Interface only receives and notifies of purge requests from the Market Maker. Market Makers may only enter interest into SQF in their assigned options series. Immediate-or-Cancel Orders entered into SQF are not subject to the (i) Order Price Protection, Market Order Spread Protection, and Size Limitation Protection in Options 3, Section 15(a)(1)(A), (1)(B), and (2)(B) respectively, for single leg orders, or (ii) Complex Order Price Protection as defined in Options 3, Section 16(c)(1) for Complex Orders.

(d) Reserved.

.04 Routing Strategies. Orders may be entered on the Exchange with a routing strategy of FIND or SRCH, or, in the alternative, an order may be marked as Do-Not-Route (“DNR”) as provided in Options 5, Section 4 through FIX only.

Adopted July 8, 2019 (SR-MRX-2019-15); amended July 24, 2019 (SR-MRX-2019-16), operative August 23, 2019; amended August 28, 2019 (SR-MRX-2019-17), operative September 27, 2019; amended September 17, 2019 (SR-MRX-2019-020), operative October 17, 2019; amended February 14, 2020 (SR-MRX-2020-04); amended March 9, 2020 (SR-MRX-2020-06); amended Sep. 30, 2022 (SR-MRX-2022-18), operative Nov. 7, 2022; amended Sep. 21, 2022 (SR-MRX-2022-10), operative Nov. 7, 2022; amended Oct. 21, 2022 (SR-MRX-2022-23), operative Nov. 20, 2022; amended Sep. 8, 2023 (SR-MRX-2023-16), operative Oct. 7, 2023; amended Jun. 6, 2023 (SR-MRX-2023-10), operative Oct. 17, 2023; amended Nov. 28, 2023 (SR-MRX-2023-22); amended Jul. 24, 2024 (SR-MRX-2024-27), operative Aug. 23, 2024; amended Dec. 3, 2024 (SR-MRX-2024-47), operative Jan. 13, 2025; amended Feb. 6, 2025 (SR-MRX-2025-06), operative Mar. 8, 2025.

(a) Definitions. The Exchange conducts an electronic opening for all option series traded on the Exchange using its System.

(1) The "ABBO" is the Away Best Bid or Offer.

(2) The "market for the underlying security" is either the primary listing market or an alternative market designated by the primary market. In the event that the primary market is unable to open and an alternative market is not designated by the primary market and/or the alternative market designated by the primary market does not open, the Exchange may utilize a non-primary market to open all underlying securities from the primary market. The Exchange will select the non-primary market with the most liquidity in the aggregate for all underlying securities that trade on the primary market for the previous two calendar months, excluding the primary and alternative markets.

(3) The Opening Price is described herein in sections (h) and (j).

(4) The Opening Process is described herein in section (c).

(5) The Potential Opening Price is described herein in section (g).

(6) The Pre-Market BBO is the highest bid and the lowest offer among Valid Width Quotes.

(7) A "Quality Opening Market" is a bid/ask differential applicable to the best bid and offer from all Valid Width Quotes defined in a table to be determined by the Exchange and published on the Exchange's web site. The calculation of Quality Opening Market is based on the best bid and offer of Valid Width Quotes. The differential between the best bid and offer are compared to reach this determination. The allowable differential, as determined by the Exchange, takes into account the type of security (for example, Penny versus non-Penny Interval Program issue), volatility, option premium, and liquidity. The Quality Opening Market differential is intended to ensure the price at which the Exchange opens reflects current market conditions.

(8) A "Valid Width Quote" is a two-sided electronic quotation submitted by a Market Maker that meets the following requirements: differentials shall be no more than $5, provided that, in the case of equity options, the bid/ask differential stated above shall not apply to in-the-money series where the market for the underlying security is wider than the differential set forth above. The bid/ask differentials for in-the-money options series may be as wide as the quotation for the underlying security on the primary market, or its decimal equivalent rounded down to the nearest minimum increment. The Exchange may establish differences other than the above for one or more series or classes of options. Such differences will be posted by the Exchange on its website.

(9) A "Zero Bid Market" is where the best bid for an options series is zero.

(10) The term "imbalance" shall mean the number of unmatched contracts priced through the Potential Opening Price.

(b) Eligible interest during the Opening Process includes Valid Width Quotes, Opening Sweeps and orders, including Opening Only Orders, but excluding orders with a Time in Force of "Immediate-or-Cancel" and Add Liquidity Orders. Quotes, other than Valid Width Quotes, will not be included in the Opening Process. The displayed and non-displayed portions of Reserve Orders are considered for execution and in determining the Opening Price throughout the Opening Process.

(1) Opening Sweep.

(i) A Market Maker assigned in a particular option may only submit an Opening Sweep if, at the time of entry of the Opening Sweep, that Market Maker has already submitted and maintains a Valid Width Quote. All Opening Sweeps in the affected series entered by a Market Maker will be cancelled immediately if that Market Maker fails to maintain a continuous quote with a Valid Width Quote in the affected series.

(ii) Opening Sweeps may be entered at any price with a minimum price variation applicable to the affected series, on either side of the market, at single or multiple price level(s), and may be cancelled and re-entered. A single Market Maker may enter multiple Opening Sweeps, with each Opening Sweep at a different price level. If a Market Maker submits multiple Opening Sweeps, the System will consider only the most recent Opening Sweep at each price level submitted by such Market Maker in determining the Opening Price. Unexecuted Opening Sweeps will be cancelled once the affected series is open.

(2) The System will allocate interest pursuant to Options 3, Section 10.

(c) Market Maker Valid Width Quotes and Opening Sweeps received starting at 9:25 AM Eastern Time are included in the Opening Process. Orders entered at any time before an option series opens are included in the Opening Process.

(1) The Opening Process for an option series will be conducted pursuant to paragraphs (f) - (j) below on or after 9:30 AM Eastern Time if: the ABBO, if any, is not crossed; and the System has received, within two minutes (or such shorter time as determined by the Exchange and disseminated to membership on the Exchange's web site) of the opening trade or quote on the market for the underlying security in the case of equity options or, in the case of index options, within two minutes of the receipt of the opening price in the underlying index (or such shorter time as determined by the Exchange and disseminated to membership on the Exchange's web site), or within two minutes of market opening for the underlying security in the case of U.S. dollar-settled foreign currency options (or such shorter time as determined by the Exchange and disseminated to membership on the Exchange's web site) any of the following:

(i) the Primary Market Maker's ("PMM") Valid Width Quote; or

(ii) the Valid Width Quote of at least one Competitive Market Maker ("CMM").

(2) For all options, the underlying security, including indexes, must be open on the market for the underlying security for a certain time period as determined by the Exchange for the Opening Process to commence. The time period shall be no less than 100 milliseconds and no more than 5 seconds.

(3) The PMM assigned in a particular equity or index option must enter a Valid Width Quote, in 90% of their assigned series, not later than one minute following the dissemination of a quote or trade by the market for the underlying security or, in the case of index options, following the receipt of the opening price in the underlying index. The PMM assigned in a particular U.S. dollar-settled foreign currency option must enter a Valid Width Quote, in 90% of their assigned series, not later than one minute after the announced market opening. Provided an options series has not opened pursuant to Options 3, Section 8(c)(1)(ii), PMMs must promptly enter a Valid Width Quote in the remainder of their assigned series, which did not open within one minute following the dissemination of a quote or trade by the market for the underlying security or, in the case of index options, following the receipt of the opening price in the underlying index or, with respect to U.S. dollar-settled foreign currency options, following the announced market opening. Once an options series has opened pursuant to Options 3, Section 8(c)(1)(i) and ii, a PMM must submit intra-day, two-sided quotes in such options series pursuant to Options 2, Section 5(e)(2).

(4) A CMM that submits a quote pursuant to this Rule in any option series when the PMM's quote has not been submitted shall be required, once an options series has opened, to submit intra-day, two-sided quotes in such option series pursuant to Options 2, Section 5(e)(1).

(5) The Opening Process will stop and an option series will not open if the ABBO becomes crossed or when a Valid Width Quote(s) pursuant to Options 3, Section 8(c)(1) is no longer present. Once each of these conditions no longer exist, the Opening Process in the affected option series will start again pursuant to paragraphs (e) - (j) below.

(d) Reopening After a Trading Halt. The procedure described in Options 3, Section 8 will be used to reopen an option series after a trading halt. If there is a trading halt or pause in the underlying security, the Opening Process will start again irrespective of the specific times listed in paragraph (c)(1).

(e) Opening with a BBO (No Trade). If there are no opening quotes or orders that lock or cross each other and no routable orders locking or crossing the ABBO, the System will open with an opening quote by disseminating the Exchange's best bid and offer among quotes and orders ("BBO") that exist in the System at that time, unless all three of the following conditions exist: (i) a Zero Bid Market; (ii) no ABBO; and (iii) no Quality Opening Market. If all three conditions exist, the Exchange will calculate an Opening Quote Range pursuant to paragraph (i) and conduct the Price Discovery Mechanism pursuant to paragraph (j) below.

(f) Pre-Market BBO Calculation. If there are opening Valid Width Quotes, or orders, that lock or cross each other, the System will calculate the Pre-Market BBO.

(g) Potential Opening Price. The Potential Opening Price indicates a price where the System may open once all other Opening Process criteria is met. To calculate the Potential Opening Price, the System will take into consideration all Valid Width Quotes and orders (including Opening Sweeps and displayed and non-displayed portions of Reserve Orders) for the option series and identify the price at which the maximum number of contracts can trade ("maximum quantity criterion"). In addition, paragraphs (h)(3)(i) and (i)(5) - (7) below contain additional provisions related to Potential Opening Price.

(1) More Than One Potential Opening Price. When two or more Potential Opening Prices would satisfy the maximum quantity criterion and leave no contracts unexecuted, the System takes the highest and lowest of those prices and takes the mid-point; if such mid-point is not expressed as a permitted minimum price variation, it will be rounded up to the minimum price variation.

(2) If two or more Potential Opening Prices for the affected series would satisfy the maximum quantity criterion and leave contracts unexecuted, the Opening Price will be either the lowest executable bid or highest executable offer of the largest sized side.

(3) The Opening Price is bounded by the better away market price that may not be satisfied with the Exchange routable interest.

(h) Opening with Trade. The Exchange will open the option series for trading with a trade on Exchange interest only at the Opening Price, if any of these conditions occur:

(1) the Potential Opening Price is at or within the best of the Pre-Market BBO and the ABBO;

(2) the Potential Opening Price is at or within the non-zero bid ABBO if the Pre-Market BBO is crossed; or

(3) where there is no ABBO, the Potential Opening Price is at or within the Pre-Market BBO which is also a Quality Opening Market.

(i) If there is more than one Potential Opening Price which meets the conditions set forth in paragraphs (1) through (3) above where:

(A) no contracts would be left unexecuted and

(B) any value used for the mid-point calculation (which is described in paragraph (g) above) would cross either:

(I) the Pre-Market BBO, or

(II) the ABBO,

then, for the purposes of calculating the midpoint the Exchange will use the better of the Pre-Market BBO or ABBO as a boundary price and will open the option series for trading with an execution at the resulting Potential Opening Price. If these conditions are not met, an Opening Quote Range will be calculated pursuant to paragraph (i) below and thereafter, the Price Discovery Mechanism in paragraph (j) below will commence.

(i) The System will calculate an Opening Quote Range ("OQR") for a particular option series that will be utilized in the Price Discovery Mechanism described below, if the Exchange has not opened subject to any of the provisions above. OQR is constrained by the least aggressive limit prices within the broader limits of OQR. The least aggressive buy order or Valid Width Quote bid and least aggressive sell order or Valid Width Quote offer within the OQR will further bound the OQR.

(1) Except as provided in paragraphs (3) and (4) below, to determine the minimum value for the OQR, an amount, as defined in a table to be determined by the Exchange, will be subtracted from the highest quote bid among Valid Width Quotes on the Exchange and on the away market(s), if any.

(2) Except as provided in paragraphs (3) and (4) below, to determine the maximum value for the OQR, an amount, as defined in a table to be determined by the Exchange, will be added to the lowest quote offer among Valid Width Quotes on the Exchange and on the away market(s), if any.

(3) If one or more away markets are disseminating a BBO that is not crossed, (the Opening Process will stop and an option series will not open if the ABBO becomes crossed pursuant to (c)(5)) and there are Valid Width Quotes on the Exchange that cross each other or cross the ABBO:

(i) The minimum value for the OQR will be the highest away bid.

(ii) The maximum value for the OQR will be the lowest away offer.

(4) If there are Valid Width Quotes on the Exchange that cross each other, and there is no away market disseminating a BBO in the affected option series:

(i) The minimum value for the OQR will be the lowest quote bid among Valid Width Quotes on the Exchange.

(ii) The maximum value for the OQR will be the highest quote offer among Valid Width Quotes on the Exchange.

(5) If there is more than one Potential Opening Price possible where no contracts would be left unexecuted, any price used for the mid-point calculation (which is described in paragraph (g)(1) above) that is wider than the OQR will be restricted to the OQR price on that side of the market for the purposes of the mid-point calculation.

(6) If there is more than one Potential Opening Price possible where no contracts would be left unexecuted, pursuant to paragraph (g)(3) above when contracts will be routed, the System will use the away market price as the Potential Opening Price.

(7) If the Exchange determines that non-routable interest can execute the maximum number of contracts against Exchange interest, after routable interest has been determined by the System to satisfy the away market, then the Potential Opening Price is the price at which the maximum number of contracts can execute, excluding the interest which will be routed to an away market, which may be executed on the Exchange as described in paragraph (g) above. The System will route routable interest pursuant to Options 3, Section 10(c).

(j) Price Discovery Mechanism. If the Exchange has not opened pursuant to paragraphs (e) or (h) above, after the OQR calculation in paragraph (i), the Exchange will conduct the following Price Discovery Mechanism.

(1) First, the System will broadcast an Imbalance Message for the affected series (which includes the symbol, side of the imbalance, size of matched contracts, size of the imbalance, and Potential Opening Price bounded by the Pre-Market BBO) to participants, and begin an "Imbalance Timer," not to exceed three seconds. The Imbalance Timer will be for the same number of seconds for all options traded on the Exchange. Each Imbalance Message is subject to an Imbalance Timer.

(A) An Imbalance Message will be disseminated showing a "0" volume and a $0.00 price if: (1) no executions are possible but routable interest is priced at or through the ABBO; (2) internal quotes are crossing each other; or (3) there is a Valid Width Quote, but there is no Quality Opening Market. Where the Potential Opening Price is through the ABBO, an imbalance message will display the side of interest priced through the ABBO.

(2) Any new interest received by the System will update the Potential Opening Price. If during or at the end of the Imbalance Timer, the Opening Price is at or within the OQR, the Imbalance Timer will end and the System will open with a trade at the Opening Price if the executions consist of Exchange interest only without trading through the ABBO and without trading through the limit price(s) of interest within OQR which is unable to be fully executed at the Opening Price. If no new interest comes in during the Imbalance Timer and the Potential Opening Price is at or within OQR and does not trade through the ABBO, the Exchange will open with a trade at the end of the Imbalance Timer at the Potential Opening Price.

(3) Next, provided the option series has not opened pursuant to paragraph (j)(2) above, the System will:

(i) send a second Imbalance Message with a Potential Opening Price that is bounded by the OQR (and would not trade through the limit price(s) of interest within OQR which is unable to be fully executed at the Opening Price) and includes away market volume in the size of the imbalance to participants; and concurrently.

(ii) initiate a Route Timer, not to exceed one second. The Route Timer operates as a pause before an order is routed to an away market. If during the Route Timer, interest is received by the System which would allow the Opening Price to be within OQR without trading through away markets and without trading through the limit price(s) of interest within OQR which is unable to be fully executed, the System will open with trades and the Route Timer will simultaneously end. The System will monitor quotes and orders received during the Route Timer period and make ongoing corresponding changes to the permitted OQR and Potential Opening Price to reflect them.

(iii) If no trade occurred pursuant to (ii) above, when the Route Timer expires, if the Potential Opening Price is within OQR (and would not trade through the limit price(s) of interest within OQR that is unable to be fully executed at the Opening Price), the System will determine if the total number of contracts displayed at better prices than the Exchange's Potential Opening Price on away markets ("better priced away contracts") would satisfy the number of marketable contracts available on the Exchange. The Exchange will open the option series by routing and/or trading on the Exchange, pursuant to paragraphs (A)-(C) below.

(A) If the total number of better priced away contracts would satisfy the number of marketable contracts available on the Exchange on either the buy or sell side, the System will route all marketable contracts on the Exchange to such better priced away markets as an ISO designated as an Immediate-or-Cancel ("IOC") order(s), and determine an opening BBO that reflects the interest remaining on the Exchange. The System will price any contracts routed to away markets at the Exchange's Opening Price; or

(B) If the total number of better priced away contracts would not satisfy the number of marketable contracts the Exchange has, the System will determine how many contracts it has available at the Exchange Opening Price. If the total number of better priced away contracts plus the number of contracts available at the Exchange Opening Price would satisfy the number of marketable contracts on the Exchange on either the buy or sell side, the System will contemporaneously route, based on price/time priority of routable interest, a number of contracts that will satisfy interest at away markets at prices better than the Opening Price and trade available contracts on the Exchange at the Exchange Opening Price. The System will price any contracts routed to away markets at the better of the Exchange Opening Price or the order's limit price pursuant to this sub-paragraph; or

(C) If the total number of better priced away contracts plus the number of contracts available at the Exchange Opening Price plus the contracts available at away markets at the Exchange Opening Price would satisfy the number of marketable contracts the Exchange has on either the buy or sell side, the System will contemporaneously route, based on price/time priority of routable interest, a number of contracts that will satisfy interest at away markets at prices better than the Exchange Opening Price (pricing any contracts routed to away markets at the better of the Exchange Opening Price or the order's limit price), trade available contracts on the Exchange at the Exchange Opening Price, and route a number of contracts that will satisfy interest at away markets at prices equal to the Exchange Opening Price.

(4) The System may send up to two additional Imbalance Messages (which may occur while the Route Timer is operating) bounded by OQR and reflecting away market interest in the volume. After the Route Timer has expired, the processes in paragraph (3) will repeat (except no new Route Timer will be initiated).

(5) Forced Opening. After all additional Imbalance Messages have occurred pursuant to paragraph (4) above, the System will open the series by executing as many contracts as possible by routing to away markets at prices better than the Exchange Opening Price for their disseminated size, trading available contracts on the Exchange at the Exchange Opening Price bounded by OQR (without trading through the limit price(s) of interest within OQR which is unable to be fully executed at the Opening Price), and routing contracts to away markets at prices equal to the Exchange Opening Price at their disseminated size. In this situation, the System will price any contracts routed to away markets at the better of the Exchange Opening Price or the order's limit price. Any unexecuted contracts from the imbalance not traded or routed will be cancelled back to the entering participant if they remain unexecuted and priced through the Opening Price, otherwise orders will remain in the Order Book, if consistent with the Member's instructions.

(6) The System will execute orders at the Opening Price that have contingencies (such as, without limitation, Reserve Orders) and non-routable orders, such as a "Do-Not-Route" or "DNR" Orders, to the extent possible. The System will only route non-contingency orders, except that Reserve Orders may route up to their full volume.

(i) Pursuant to Options 3, Section 8(j)(6), the System will re-price DNR Orders (that would otherwise have to be routed to the exchange(s) disseminating the ABBO for an opening to occur) to the current away best offer (for bids) or the current away best bid (for offers) as non-displayed, and display at a price that is one minimum trading increment inferior to the ABBO, and disseminate such DNR Order as part of the new BBO.  The System will cancel any order or quote that is priced through the Opening Price.  All other interest will be eligible for trading after opening.

(ii) During the opening of the option series, where there is an execution possible, the System will give priority to Market Orders first, then to resting Limit Orders and quotes. The allocation provisions of Options 3, Section 10 and the Supplementary Material thereto apply with respect to other orders and quotes with the same price.

(iii) Upon opening of the option series, regardless of an execution, the System disseminates the price and size of the Exchange's best bid and offer (BBO).

(iv) Remaining contracts which are not priced through the Exchange Opening Price after routing a number of contracts to satisfy better priced away contracts will be posted to the Order Book at the better of the away market price or the order's limit price.

(k) Opening Process Cancel Timer. The Opening Process Cancel Timer represents a period of time since the underlying market has opened, and shall be established and disseminated by MRX on its website. If an option series has not opened before the conclusion of the Opening Process Cancel Timer, a Member may elect to have orders returned by providing written notification to the Exchange. These orders include all non Good-Till-Canceled and Good-Till-Date Orders received over the OTTO or FIX protocol.

Adopted July 8, 2019 (SR-MRX-2019-15); amended July 24, 2019 (SR-MRX-2019-16), operative August 23, 2019; amended March 23, 2020 (SR-MRX-2020-08); amended April 3, 2020 (SR-MRX-2020-09); amended June 23, 2020 (SR-MRX-2020-13); amended July 19, 2021 (SR-MRX-2021-09); amended Sep. 9, 2022 (SR-MRX-2022-16), operative Nov. 7, 2022; amended Sep. 30, 2022 (SR-MRX-2022-18), operative Nov. 7, 2022.

(a) Halts. An Exchange official designated by the Board may halt trading in any stock option in the interests of a fair and orderly market.

(1) The following are among the factors that may be considered in determining whether the trading in a stock option should be halted:

(i) trading in the underlying security has been halted or suspended in one or more of the markets trading the underlying security.

(ii) the opening of such underlying security has been delayed because of unusual circumstances.

(iii) other unusual conditions or circumstances are present.

(2) A designated Exchange official may halt trading (including a rotation) for a class or classes of options contracts whenever there is a halt of trading in an underlying security in one or more of the markets trading the underlying security. In such event, without the need for action by the Primary Market Maker, all trading in the effected class or classes of options may be halted. The Exchange shall disseminate through its trading facilities and over OPRA a symbol in respect of such class or classes of options indicating that trading has been halted, and a record of the time and duration of the halt shall be made available to vendors. No Member or person associated with a Member shall effect a trade on the Exchange in any options class in which trading has been halted under the provisions of this Rule during the time in which the halt remains in effect. During a halt, the Exchange will maintain existing orders on the book (but not existing quotes prior to the halt), accept orders and quotes, and process cancels and modifications, except existing quotes are cancelled.

(b) Resumptions. Trading in a stock option that has been the subject of a halt under paragraph (a)(1) above may be resumed upon the determination by an Exchange official designated by the Board that the conditions which led to the halt are no longer present or that the interests of a fair and orderly market are best served by a resumption of trading.

(c) Trading Pauses. Trading on the Exchange in any option contract shall be halted whenever trading in the underlying security has been paused by the primary listing market. Trading in such options contracts may be resumed upon a determination by the Exchange that the conditions that led to the pause are no longer present and that the interests of a fair and orderly market are best served by a resumption of trading, which in no circumstances will be before the Exchange has received notification that the underlying security has resumed trading on at least one exchange.

(d) Capitalized terms used in this paragraph (d) shall have the same meaning as provided for in the Plan to Address Extraordinary Market Volatility Pursuant to Rule 608 of Regulation NMS, as it may be amended from time to time ("LULD Plan"). During a Limit State and Straddle State in the Underlying NMS stock:

(1) The Exchange will not open an affected option.

(2) Provided the Exchange has opened an affected option for trading, the Exchange shall reject Market Orders, as defined in Options 3, Section 7(a), and Market Complex Orders as defined in Options 3, Section 14(b), and shall notify Members of the reason for such rejection. The Exchange shall cancel Complex Orders that are Market Orders residing in the System, if the Market Complex Order becomes marketable while the affected underlying is in a Limit or Straddle State. Market Complex Orders exposed for price improvement pursuant to Supplementary Material .01 to Options 3, Section 14, pending in the System will continue to be processed. If at the end of the exposure period the affected underlying is in a Limit or Straddle State, the Market Complex Order will be cancelled. If the affected underlying is no longer in a Limit or Straddle State after the exposure period, the Market Complex Order will be processed with normal handling.

(3) Provided the Exchange has opened an affected option for trading, the Exchange shall elect Stop Orders if the condition as provided in Options 3, Section 7(d) is met, and, because they become Market Orders, shall cancel them back and notify Members of the reason for such rejection.

(4) When the security underlying an option class is in a Limit State or Straddle State, the maximum quotation spread requirements for Market Maker quotes contained in Options 2, Section 4(b)(4) and the intra-day quotation requirements contained in Options 2, Section 5(e) shall be suspended. The time periods associated with Limit States and Straddle States will not be considered by the Exchange when evaluating whether a Market Maker complied with the intra-day quotation requirements contained in Options 2, Section 5(e).

(e) Trading Halts Due To Extraordinary Market Volatility

The Exchange shall halt trading in all securities whenever a market-wide trading halt (commonly known as a circuit breaker) is initiated on the New York Stock Exchange in response to extraordinary market conditions.

Supplementary Material to Options 3, Section 9

.01 The Exchange shall nullify any transaction that occurs:

(a) during a trading halt in the affected option on the Exchange; or

(b) with respect to equity options (including options overlying ETFs), during a regulatory halt as declared by the primary listing market for the underlying security.

Adopted July 8, 2019 (SR-MRX-2019-15); amended October 18, 2019 (SR-MRX-2019-23); amended Sep. 30, 2022 (SR-MRX-2022-18), operative Nov. 7, 2022.

(a) Definitions and Applicability.

(1) As provided in Options 1, Section 1(a)(6) and (a)(26), a "bid" is a quotation or Limit Order to buy options contracts and an "offer" is a quotation or Limit Order to sell options contracts. "Quotations," which are defined in Options 1, Section 1 (a)(45), may only be entered on the Exchange by Market Makers in the options classes to which they are appointed under Options 2, Section 3. Limit Orders may be entered by Market Makers in certain circumstances as provided in the Rules and by Electronic Access Members (either as agent or as principal). "Priority Customer Orders" and "Professional Orders" are defined in Options 1, Section 1(a)(37) and (38).

(2) Applicability. This rule does not apply to the Block Order Mechanism described within Options 3, Section 11(a), the Facilitation Mechanism described within Options 3, Section 11(b), the Solicited Order Mechanism described within Options 3, Section 11(d), the Price Improvement Mechanism described within Options 3, Section 13, orders described within Options 3, Section 12, unless Options 3, Section 10 is specifically referenced within MRX Rules applicable to the aforementioned functionality.

(b) Priority on the Exchange. The highest bid and lowest offer shall have priority on the Exchange.

(1) Zero-Bid Option Series. In the case where the bid price for any options contract is $0.00, a Market Order accepted into the System to sell that series shall be considered a Limit Order to sell at a price equal to the minimum trading increment as defined in Options 3, Section 3. With respect to Market Orders to sell which are submitted prior to the Opening Process and persist after the Opening Process, those orders are posted at a price equal to the minimum trading increment as defined in Options 3, Section 10.

(c) Execution Priority and Processing in the System. The Exchange will apply a Size Pro- Rata execution algorithm to orders, unless otherwise specified. The System shall execute trading interest within the System in price priority, meaning it will execute all trading interest at the best price level within the System before executing trading interest at the next best price. Size Pro-Rata Priority shall mean that if there are two or more resting orders or quotes at the same price, the System allocates contracts from an incoming order or quote to resting orders and quotes beginning with the resting order or quote displaying the largest size proportionally according to displayed size, based on the total number of contracts displayed at that price. If the result is not a whole number, it will be rounded up to the nearest whole number. If there are still contracts to be allocated after the displayed size of all orders at that price has been executed, the remaining size from the incoming order will be allocated proportionally against non-displayed interest according to remaining total size of each resting order at such price, beginning with the order which has the largest total size remaining.

(1) Priority Overlays Applicable to Size Pro-Rata Execution Algorithm: the Exchange will apply the following designated Member priority overlays. No Member shall be entitled to receive a number of contracts that is greater than the size that is associated with their quotation or order.

(A) Priority Customer: The highest bid and lowest offer shall have priority except that Priority Customer orders shall have priority over non-Priority Customer interest at the same price in the same options series. If there are two or more Priority Customer orders for the same options series at the same price, priority shall be afforded to such Priority Customer orders in the sequence in which they are received by the System.

(B) Enhanced Primary Market Maker Priority: A Primary Market Maker may be assigned by the Exchange in each option class in accordance with Options 2, Section 3(b). After all Priority Customer orders have been fully executed, provided the Primary Market Maker's quote is at the better of the internal BBO or the NBBO, the Primary Market Maker shall be entitled to receive the allocation described in Options 3, Section 10(c)(1)(B)(i), unless the incoming order to be allocated is a Preferenced Order and the Primary Market Maker is not the Preferred Market Maker, in which case allocation would be pursuant to (c)(1)(C). If the order is a Preferenced Order and the Primary Market Maker is also the Preferred Market Maker ("Preferred Market Maker Priority") then the Preferred Market Maker Participation Entitlement in (c)(1)(C) or (c)(1)(E) applies. The Primary Market Maker shall not be entitled to receive a number of contracts that is greater than the size associated with such Primary Market Maker's quote.

(i) When the Primary Market Maker is at the same price as a non- Priority Customer Order or Market Maker quote and the number of contracts is greater than 5, the Primary Market Maker shall receive the greater of:

a. 60% of remaining interest if there is one other non-Priority Customer Order or Market Maker quote at that price; 40% of remaining interest if there are two other non-Priority Customer Orders or Market Maker quotes at that price; or 30% of remaining interest if there are more than two other non-Priority Customer Orders and Market Maker quotes at that price ( the "Primary Market Maker Participation Entitlement"); or

b. the Primary Market Maker's Size Pro-Rata share under subparagraph (c)(1)(E) ("All Other Remaining Interest").

(C) Preferred Market Maker Priority: After all Priority Customer orders have been fully executed, upon receipt of a Preferenced Order pursuant to Supplementary .01 to Options 3, Section 10, provided the Preferred Market Maker's quote is at the better of the internal BBO or the NBBO, the Preferred Market Maker will be afforded a participation entitlement. Preferred Market Maker participation entitlements will apply only after the Opening Process.

(i) When the Preferred Market Maker is at the same price as a non- Priority Customer Order or Market Maker quote, pursuant to the Preferred Market Maker participation entitlement, the Preferred Market Maker shall receive, with respect to a Preferenced Order, the greater of:

a. 60% of remaining interest if there is one other non-Priority Customer Order or Market Maker quote at that price; or 40% of remaining interest if there are two or more other non-Priority Customer Orders or Market Maker quotes at that price; or

b. the Preferred Market Maker's Size Pro-Rata share under subparagraph (c)(1)(E) ("All Other Remaining Interest"); or

c. the entitlement for Orders of 5 Contracts or Fewer under subparagraph (c)(1)(D) if the Preferred Market Maker is also the Primary Market Maker and the incoming Order is for 5 Contracts or Fewer.

(D) Entitlement for Orders of 5 Contracts or Fewer. This entitlement for Orders of 5 Contracts or Fewer shall only apply after the Opening Process. A Primary Market Maker is not entitled to receive a number of contracts that is greater than the size that is associated with its quote. On a quarterly basis, the Exchange will evaluate what percentage of the volume executed on the Exchange is comprised of orders for 5 contracts or fewer allocated to Primary Market Maker, and will reduce the size of the orders included in this provision if such percentage is over 40%.

(i) A Primary Market Maker is entitled to priority with respect to Orders of 5 Contracts or Fewer if the Primary Market Maker has a quote at the better of the internal BBO or the NBBO with no other Priority Customer or Preferenced Market Maker interest present which has a higher priority, including when the Primary Market Maker is also the Preferred Market Maker.

(ii) If the Primary Market Maker is quoting at the better of the internal BBO or the NBBO and the Primary Market Maker is also the Preferred Market Maker or there is no Preferred Market Maker quoting at the better of the internal BBO or the NBBO, and a Priority Customer has a higher priority at the time of execution, the Priority Customer will be allocated the Orders of 5 Contracts or Fewer up to their displayed size pursuant Options 3, Section 10(c)(1)(A) and if contracts remain, the Primary Market Maker will be allocated the remainder.

(iii) If the Primary Market Maker is quoting at the better of the internal BBO or the NBBO and no Priority Customer has a higher priority at the time of execution and a Preferred Market Maker, who is not the Primary Market Maker, is quoting at the better of the internal BBO or the NBBO then allocation shall proceed according to Options 3, Section 10(c)(1)(C).

(E) All Other Remaining Interest: If there are contracts remaining after all priorities in (A)-(D) have been fully executed, notwithstanding Options 3, Section 7(g)(3) and (k)(2), such contracts shall be executed based on the Size Pro-Rata execution algorithm as described within Options 3, Section 10(c). Legging Orders will be allocated after all other non-displayed interest, pursuant to Options 3, Section 7(k)(3).

(2) A Market Maker is entitled only to an Enhanced Primary Market Maker Priority pursuant to Options 3, Section 10(c)(1)(B) or the Entitlement for Orders of 5 Contracts or Fewer pursuant to Options 3, Section 10(c)(1)(D) on a quote, or the Preferred Market Maker Priority pursuant to Options 3, Section 10(c)(1)(C) on a quote.

Supplementary Material to Options 3, Section 10

.01 Preferred Competitive Market Makers are subject to enhanced quoting requirements as provided in Options 2, Section 5(e)(3).

.02 Notification of Public Customer Interest on the Book. The Exchange shall make available to Members the quantity of Public Customer contracts included in the Exchange's highest bid and lowest offer.

Adopted July 8, 2019 (SR-MRX-2019-15); amended August 28, 2019 (SR-MRX-2019-17), operative September 27, 2019; amended Dec. 9, 2019 (SR-MRX-2019-25); amended Sep. 9, 2022 (SR-MRX-2022-16), operative Nov. 7, 2022; amended Sep. 30, 2022 (SR-MRX-2022-18), operative Nov. 7, 2022; amended Sep. 21, 2022 (SR-MRX-2022-10), operative Nov. 7, 2022.

Changes have been approved, but not yet implemented. For more information, see the attached document.

For purposes of this Rule, a "broadcast message" means an electronic message that is sent by the Exchange to all Members, and a "Response" means an electronic message that is sent by Members in response to a broadcast message. Responses represent non-firm interest that can be canceled or modified at any time prior to execution. Responses are not displayed to any market participants.  Also for purposes of this Rule, the time given to Members to enter Responses for any of the below auction mechanisms shall be designated by the Exchange via an Options Trader Alert, but no less than 100 milliseconds and no more than 1 second.

(a) Block Order Mechanism. The Block Order Mechanism is a process by which a Member can obtain liquidity for the execution of block-size orders. The Block Order Mechanism is for single leg transactions only. Block-size orders are orders for fifty (50) contracts or more.

(1) Upon the entry of an order into the Block Order Mechanism, a broadcast message will be sent that includes the series, and may include price, size and/or side, as specified by the Member entering the order, and Members will be given an opportunity to enter Responses with the prices and sizes at which they would be willing to trade with a block-size order.

(2) At the conclusion of the time given Members to enter Responses, either an execution will occur automatically, or the order will be cancelled.

(i) Responses, orders, and quotes will be executed at a single block execution price that is the price for the block-size order at which the maximum number of contracts can be executed consistent with the Member's instruction. Bids (offers) on the Exchange at the time the block order is executed that are priced higher (lower) than the block execution price, as well as Responses that are priced higher (lower) than the block execution price, will be executed in full at the block execution price up to the size of the block order.

(ii) At the block execution price, Priority Customer Orders and Priority Customer Responses will be executed first in price time priority, and then quotes, non-Priority Customer Orders, and non-Priority Customer Responses will participate in the execution of the block-size order based upon the percentage of the total number of contracts available at the block execution price that is represented by the size of the quote, non-Priority Customer Order, or non-Priority Customer Response.

(3) If a trading halt is initiated after an order is entered into the Block Order Mechanism, such auction will be automatically terminated without execution.

(b) Facilitation Mechanism. The Facilitation Mechanism is a process by which an Electronic Access Member can execute a transaction wherein the Electronic Access Member seeks to facilitate a block-size order it represents as agent, and/or a transaction wherein the Electronic Access Member solicited interest to execute against a block-size order it represents as agent. Electronic Access Members must be willing to execute the entire size of orders entered into the Facilitation Mechanism.

(1) Orders must be entered into the Facilitation Mechanism at a price that is (A) equal to or better than the NBBO and the internal BBO on the same side of the market as the agency order unless there is a Priority Customer order on the BBO or internal BBO on the same side of the market as the agency order, in which case the order must be entered at an improved price over the Priority Customer order; and (B) equal to or better than the ABBO on the opposite side. Orders that do not meet these requirements are not eligible for the Facilitation Mechanism and will be rejected.

(2) Upon the entry of an order into the Facilitation Mechanism, a broadcast message that includes the series, price and size of the Agency Order, and whether it is to buy or sell, will be sent and Members will be given an opportunity to enter Responses with the prices and sizes at which they want to participate in the facilitation of the order.

(3) Responses may be priced at the price of the order to be facilitated or at a better price and will only be considered up to the size of the order to be facilitated.

(4) At the end of the period given for the entry of Responses, the facilitation order will be automatically executed.

(i) Unless there is sufficient size to execute the entire facilitation order at a better price, Priority Customer Orders and Priority Customer Responses to buy (sell) at the time the facilitation order is executed that are priced higher (lower) than the facilitation price will be executed at the facilitation price. Non-Priority Customer Orders and non-Priority Customer Responses to buy (sell) and Market Maker quotes at the time the facilitation order is executed that are priced higher (lower) than the facilitation price will be executed at their stated price, thereby providing the order being facilitated a better price for the number of contracts associated with such higher bids (lower offers). The facilitation order will be cancelled at the end of the exposure period if an execution would take place at a price that is inferior to the Exchange best bid (offer), or if there is a Priority Customer Order on the same side Exchange best bid (offer) at the same price as the facilitation price unless the Facilitation Order can execute at a price that is better than the same side Priority Customer Order.

(ii) The facilitating Electronic Access Member will be allocated up to forty percent (40%) (or such lower percentage requested by the Member) of the original size of the facilitation order, but only after better-priced Responses, orders and quotes, as well as Priority Customer Orders and Priority Customer Responses at the facilitation price, are executed in full at such price point. Thereafter, quotes, non-Priority Customer Orders, and non-Priority Customer Responses at the facilitation price will participate in the execution of the facilitation order based upon the percentage of the total number of contracts available at the facilitation price that is represented by the size of the quote, non-Priority Customer Order, or non-Priority Customer Response.

(iii) Upon entry of an order into the Facilitation Mechanism, the facilitating Electronic Access Member can elect to automatically match the price and size of orders, quotes and responses received during the exposure period up to a specified limit price or without specifying a limit price. If a Member elects to auto-match, the facilitating Electronic Access Member will be allocated the aggregate size of all competing quotes, orders, and Responses at each price point, or at each price point up to the specified limit price if a limit is specified, until a price point is reached where the balance of the order can be fully executed. At such price point, the facilitating Member shall be allocated up to forty percent (40%) (or such lower percentage requested by the Member) of the original size of the facilitation order, but only after Priority Customer Orders and Priority Customer Responses at such price point. Thereafter, all non-Priority Customer Orders, non-Priority Customer Responses, and quotes at the price point will participate in the execution of the facilitation order based upon the percentage of the total number of contracts available at the facilitation price that is represented by the size of the non-Priority Customer Order, non-Priority Customer Response or quote. An election to automatically match better prices cannot be cancelled or altered during the exposure period.

(iv) Under no circumstances will the facilitating Electronic Access Member receive an allocation percentage, at the final price point, of more than 40% of the original size of the Facilitation Order with one or multiple competing quote(s), order(s), or Response(s), except for rounding, when competing quotes, orders, or Responses have contracts available for execution.

(5) If a trading halt is initiated after an order is entered into the Facilitation Mechanism, such auction will be automatically terminated without execution.

(c) Complex Facilitation Mechanism. Electronic Access Members may use the Facilitation Mechanism in sub-paragraph (b) above to execute block-size Complex Orders at a net price. Each options leg of a Complex Order entered into the Complex Facilitation Mechanism must meet the minimum contract size requirement. The Complex Facilitation Mechanism is a process by which an Electronic Access Member can execute a transaction wherein the Electronic Access Member seeks to facilitate a block-size Complex Order it represents as agent, and/or a transaction wherein the Electronic Access Member solicited interest to execute against a block-size Complex Order it represents as agent. Electronic Access Members must be willing to execute the entire size of Complex Orders entered into the Complex Facilitation Mechanism.

(1) Complex Orders entered into the Complex Facilitation Mechanism must be priced within the parameters described below. Complex Orders that do not meet these requirements are not eligible for the Complex Facilitation Mechanism and will be rejected.

(2) Complex Options Orders must be entered into the Complex Facilitation Mechanism at a price that is (A) equal to or better than the best bid or offer on the Complex Order Book on the same side of the market as the Agency Order; and (B) equal to or better than the best net price achievable from the best MRX bids and offers for the individual legs on the same side of the market as the Agency Order; provided that, if there is a Priority Customer order on the best bid or offer for any leg, the order must be entered at an improved price consistent with Options 3, Section 14(c)(2).

(3) Stock-Option Orders and Stock-Complex Orders must be entered into the Complex Facilitation Mechanism at a price that is (A) equal to or better than the best bid or offer on the Complex Order Book on the same side of the market as the Agency Order; and (B) equal to or better than the best net price achievable from the best MRX bids and offers for the individual legs on both sides of the market; provided that, if there is a Priority Customer order on the best bid or offer for any leg, the order must be entered at an improved price consistent with Options 3, Section 14(c)(2).

(4) A Complex Order entered into the Complex Facilitation Mechanism will be rejected if any component of the Complex Order has not opened for trading, or if there is a trading halt in any series underlying the Complex Order. If a trading halt is initiated after the order is entered into the Complex Facilitation Mechanism, such auction will be automatically terminated without execution.

(5) Upon the entry of a Complex Order into the Complex Facilitation Mechanism, a broadcast message that includes the net price, side and size of the Agency Complex Order will be sent and Members will be given an opportunity to enter Responses with the net prices and sizes at which they want to participate in the facilitation of the Agency Complex Order. The time given to Members to enter Responses shall be designated by the Exchange via Options Trader Alert, but will be no less than 100 milliseconds and no more than 1 second.

(6) Responses are only executable against the Complex Order with respect to which they are entered, and will only be considered up to the size of the Complex Order to be facilitated. Responses must be entered in the increments provided in Options 3, Section 14(c)(1) at the facilitation price or at a price that is at least one cent better for the Agency Order.

(7) Responses submitted by Members shall not be visible to other auction participants during the exposure period and can be modified or deleted before the exposure period has ended. At the end of the period given for the entry of Responses, the facilitation order will be automatically executed.

(A) Unless there is sufficient size to execute the entire facilitation order at a better net price, Priority Customer Complex Orders and Priority Customer Responses to buy (sell) at the time the facilitation order is executed that are priced higher (lower) than the facilitation price will be executed at the facilitation price. Non-Priority Customer Complex Orders and non-Priority Customer Responses to buy (sell) at the time the facilitation order is executed that are priced higher (lower) than the facilitation price will be executed at their stated price, thereby providing the Complex Order being facilitated a better price for the number of contracts associated with such higher bids (lower offers).

(B) The facilitating Electronic Access Member will be allocated up to forty percent (40%) (or such lower percentage requested by the Member) of the original size of the facilitation order, but only after better-priced Responses, Complex Orders, as well as Priority Customer Complex Orders and Priority Customer Responses at the facilitation price, are executed in full. Thereafter, non-Priority Customer Complex Orders and non-Priority Customer Responses at the facilitation price will participate in the execution of the facilitation order based upon the percentage of the total number of contracts available at the facilitation price that is represented by the size of the non-Priority Customer Complex Order or non-Priority Customer Response.

(C) Upon entry of a Complex Order into the Complex Facilitation Mechanism, the facilitating Electronic Access Member can elect to automatically match the net price and size of Complex Orders, Responses received during the exposure period up to a specified limit price or without specifying a limit price. This election will also automatically match the net price available from the MRX best bids and offers on the individual legs for the full size of the order; provided that with notice to Members the Exchange may determine whether to offer this option only for Complex Options Orders, Stock-Option Orders, and/or Stock Complex Orders. If a Member elects to auto-match, the facilitating Electronic Access Member will be allocated the aggregate size of all competing Complex Orders and Responses at each price point, or at each price point up to the specified limit price if a limit is specified, until a price point is reached where the balance of the order can be fully executed. At such price point, the facilitating Member will be allocated up to forty percent (40%) (or such lower percentage requested by the Member) of the original size of the facilitation order, but only after Priority Customer Orders and Priority Customer Responses at such price point. Thereafter, non-Priority Customer Complex Orders and non-Priority Customer Responses at the price point will participate in the execution of the facilitation order based upon the percentage of the total number of contracts available at the facilitation price that is represented by the size of the non-Priority Customer Complex Order or non-Priority Customer Response. An election to automatically match better prices cannot be cancelled or altered during the exposure period.

(D) With respect to bids and offers for the individual legs of a Complex Order entered into the Complex Facilitation Mechanism, the priority rules applicable to the execution of Complex Orders contained in Options 3, Section 14(c)(2) will continue to be applicable and may prevent the execution of a Complex Order entered into the Facilitation Mechanism, in which case the transaction will be cancelled. If an improved net price for the Complex Order being executed can be achieved from Complex Orders, Responses on the Complex Order Book and, for Complex Options Orders, the MRX best bids and offers on the individual legs, the facilitation order will be executed against such interest.

(E) Under no circumstances will the facilitating Electronic Access Member receive an allocation percentage, at the final price point, of more than 40% of the original size of the Complex Facilitation Order with one or multiple competing Complex Order(s) or Response(s), except for rounding, when competing Complex Orders or Responses have contracts available for execution.

(d) Solicited Order Mechanism. The Solicited Order Mechanism is a process by which an Electronic Access Member can attempt to execute orders of 500 or more contracts it represents as agent (the "Agency Order") against contra orders that it solicited. Each order entered into the Solicited Order Mechanism shall be designated as all-or-none.

(1) Orders must be entered into the Solicited Order Mechanism at a price that is equal to or better than the NBBO and the internal BBO on both sides of the market; provided that, if there is a Priority Customer order on the BBO or internal BBO, the order must be entered at an improved price over the Priority Customer order. Orders that do not meet these requirements are not eligible for the Solicited Order Mechanism and will be rejected.

(2) Upon entry of both orders into the Solicited Order Mechanism at a proposed execution price, a broadcast message that includes the series, price and size of the Agency Order, and whether it is to buy or sell, will be sent and Members will be given an opportunity to enter Responses with the prices and sizes at which they would be willing to participate in the execution of the Agency Order.

(3) At the end of the period given Members to enter Responses, the Agency Order will be automatically executed in full or cancelled.

(i) If at the time of execution there is insufficient size to execute the entire Agency Order at an improved price (or prices), the Agency Order will be executed against the solicited order at the proposed execution price so long as, at the time of execution: (A) the execution price is equal to or better than the best bid or offer on the Exchange, and (B) there are no Priority Customer Orders or Priority Customer Responses on the Exchange that are priced equal to the proposed execution price. If there are Priority Customer Orders or Priority Customer Responses on the Exchange on the opposite side of the Agency Order at the proposed execution price and there is sufficient size to execute the entire size of the Agency Order, the Agency Order will be executed against the bid or offer, and the solicited order will be cancelled. The aggregate size of all orders, quotes and Responses at the bid or offer will be used to determine whether the entire Agency Order can be executed. Both the solicited order and Agency Order will be cancelled if an execution would take place at a price: (1) that is inferior to the best bid or offer on the Exchange; (2) if there is a Priority Customer Order or Priority Customer Response on the Exchange at the proposed execution price but there is insufficient size on the Exchange to execute the entire Agency Order; (3) if there is a Priority Customer Order on the same side Exchange best bid (offer) at the same price as the solicitation price unless the Solicitation Order can execute at a price that is better than the same side Priority Customer Order.

(ii) If at the time of execution there is sufficient size to execute the entire Agency Order at an improved price (or prices), the Agency Order will be executed at the improved price(s), subject to the condition in (i)(A), and the solicited order will be cancelled. The aggregate size of all orders, quotes and Responses at each price will be used to determine whether the entire agency order can be executed at an improved price (or prices).

(iii) When executing the Agency Order against the bid or offer in accordance with paragraph (i) above, or at an improved price in accordance with paragraph (ii) above, Priority Customer Orders and Priority Customer Responses will be executed first. Non-Priority Customer Orders, non-Priority Customer Responses, and Market Maker quotes participate next in the execution of the Agency Order based upon the percentage of the total number of contracts available at the best price that is represented by the size of the non-Priority Customer Order, non-Priority Customer Response, or Market Maker quote.

(4) If a trading halt is initiated after an order is entered into the Solicited Order Mechanism, such auction will be automatically terminated without execution.

(5) Prior to entering Agency Orders into the Solicited Order Mechanism on behalf of a customer, EAMs must deliver to the customer a written notification informing the customer that its order may be executed using the Exchange's Solicited Order Mechanism. Such written notification must disclose the terms and conditions contained in this Rule and must be in a form approved by the Exchange.

(e) Complex Solicited Order Mechanism. The Complex Solicited Order Mechanism is a process by which an Electronic Access Member can attempt to execute Complex Orders it represents as agent (the "Agency Complex Order") against contra orders that it solicited according to sub-paragraph (d) above. Each Complex Order entered into the Solicited Order Mechanism shall be designated as all-or-none, and each options leg must meet the minimum contract size requirement contained in sub-paragraph (d) above

(1) Complex Orders must be entered into the Complex Solicited Order Mechanism at a price that is (A) equal to or better than the best bid or offer on the Complex Order Book on both sides of the market; and (B) equal to or better than the best net price achievable from the best MRX bids and offers for the individual legs on both sides of the market; provided that, if there is a Priority Customer order on the best bid or offer for any leg, the order must be entered at an improved price consistent with Options 3, Section 14(c)(2). Complex Orders that do not meet these requirements are not eligible for the Complex Solicited Order Mechanism and will be rejected.

(2) A Complex Order entered into the Complex Solicited Order Mechanism will be rejected if any component of the Complex Order has not opened for trading, or if there is a trading halt in any series underlying the Complex Order. If a trading halt is initiated after the order is entered into the Complex Solicited Order Mechanism, such auction will be automatically terminated without execution.

(3) Upon entry of both orders into the Complex Solicited Order Mechanism at a proposed execution net price, a broadcast message that includes the net price, side and size of the Agency Complex Order will be sent and Members will be given an opportunity to enter Responses with the net prices and sizes at which they would be willing to participate in the execution of the Agency Complex Order. The time given to Members to enter Responses shall be designated by the Exchange via Options Trader Alert, but will be no less than 100 milliseconds and no more than 1 second. Responses are only executable against the Complex Order with respect to which they are entered, and will only be considered up to the size of the Agency Complex Order. Responses must be entered in the increments provided in Options 3, Section 14(c)(1) at the proposed execution net price or at a price that is at least one cent better for the Agency Order.

(4) Responses submitted by Members shall not be visible to other auction participants during the exposure period and can be modified or deleted before the exposure period has ended. At the end of the period given for the entry of Responses, the Agency Complex Order will be automatically executed in full pursuant to paragraphs (A) through (D) below, or cancelled.

(A) If at the time of execution there is insufficient size to execute the entire Agency Complex Order at an improved net price(s) pursuant to paragraph (e)(4)(C) below, the Agency Complex Order will be executed against the solicited Complex Order at the proposed execution net price so long as, at the time of execution: (i) the execution net price is equal to or better than the best net price achievable from the best MRX bids and offers for the individual legs, (ii) the Complex Order can be executed in accordance with Options 3, Section 14(c)(2) with respect to the individual legs, (iii) the execution net price is equal to or better than the best bid or offer on the Complex Order Book, and (iv) there are no Priority Customer Complex Orders or Responses that are priced equal to or better than the proposed execution price.

(B) If there are Priority Customer Complex Orders or Responses on the opposite side of the Agency Complex Order at the proposed execution net price and there is sufficient size to execute the entire size of the Agency Complex Order, the Agency Complex Order will be executed against such interest, and the solicited Complex Order will be cancelled, provided that: (i) the execution net price is equal to or better than the best net price achievable from the best MRX bids and offers for the individual legs, and (ii) the Complex Order can be executed in accordance with Options 3, Section 14(c)(2) with respect to the individual legs. The aggregate size of all Complex Orders, Responses and, for Complex Options Orders, the aggregate size available from the best bids and offers for the individual legs, will be used to determine whether the entire Agency Complex Order can be executed pursuant to this paragraph.

(C) If at the time of execution there is sufficient size to execute the entire Agency Complex Order at an improved net price(s), the Agency Complex Order will be executed at the improved net price(s), and the solicited Complex Order will be cancelled, provided that: (i) the execution net price is equal to or better than the best net price achievable from the best MRX bids and offers for the individual legs, and (ii) the Complex Order can be executed in accordance with Options 3, Section 14(c)(2) with respect to the individual legs. The aggregate size of all Complex Orders, Responses, and the aggregate size available from the best bids and offers for the individual legs for a Complex Options Order, will be used to determine whether the entire Agency Complex Order can be executed at an improved net price(s).

(D) When executing the Agency Complex Order against other interest in accordance with Options 3, Section 14(d)(2)(ii), Priority Customer Complex Orders and Priority Customer Responses will be executed first. Non-Priority Customer Complex Orders and non-Priority Customer Responses participate next in the execution of the Agency Complex Order based upon the percentage of the total number of contracts available at the best price that is represented by the size of the non-Priority Customer Complex Order or non-Priority Customer Response. Finally, for Complex Options Orders, bids and offers for the individual legs will be executed pursuant to Options 3, Section 10 and the Supplementary Material thereto.

(5) Prior to entering Agency Orders into the Complex Solicited Order Mechanism on behalf of a customer, EAMs must deliver to the customer a written notification informing the customer that its order may be executed using Nasdaq MRX's Solicited Order Mechanism. Such written notification must disclose the terms and conditions contained in this Rule and must be in a form approved by the Exchange.

(f) Limitation on Concurrent Complex Strategy Auctions. Only one Exposure Auction at Supplementary Material .01 to Options 3, Section 14, Complex Price Improvement Mechanism auction at Options 3, Section 13(e), Complex Facilitation Mechanism auction at Options 3, Section 11(c), or Complex Solicited Order Mechanism auction at Options 3, Section 11(e), respectively, will be ongoing at any given time in a Complex Strategy, and such auctions will not queue or overlap in any manner. The Exchange will not initiate an Exposure Auction, Complex Price Improvement Mechanism auction, Complex Facilitation Mechanism auction, or Complex Solicited Order Mechanism auction in a Complex Strategy while another Exposure Auction, Complex Price Improvement Mechanism auction, Complex Facilitation Mechanism auction, or Complex Solicited Order Mechanism auction in that Complex Strategy is ongoing. If a Complex Price Improvement Mechanism auction, Complex Facilitation Mechanism auction, or Complex Solicited Order Mechanism auction for a Complex Strategy has been initiated, an Exposure Auction for that Complex Strategy will not be initiated, and an Exposure Only Complex Order for the Complex Strategy will be cancelled back to the Member. An Exposure Order for the Complex Strategy will be processed as an order that is not marked for price improvement.

(g) Concurrent Complex Order and single leg auctions. An auction in the Block Order Mechanism at Options 3, Section 11(a), Facilitation Mechanism at Options 3, Section 11(b), Solicited Order Mechanism at Options 3, Section 11(d), or Price Improvement Mechanism at Options 3, Section 13(d), respectively, for an option series may occur concurrently with a Complex Order Exposure Auction at Supplementary Material .01 to Options 3, Section 14, Complex Facilitation Auction at Options 3, Section 11(c), Complex Solicited Order Auction at Options 3, Section 11(e), or Complex Price Improvement Mechanism auction at Options 3, Section 13(e), respectively, for a Complex Order that includes that series. To the extent that there are concurrent Complex Order and single leg auctions involving a specific option series, each auction will be processed sequentially based on the time the auction commenced. At the time an auction concludes, including when it concludes early, the auction will be processed pursuant to Options 3, Section 11(a), (b), (d), or Section 13(a), as applicable, for the single option, or pursuant to Supplementary Material .01 to Options 3, Section 14, Options 3, Section 11(c), 11(e), Options 3, Section 13(e), as applicable, for the Complex Order.

Supplementary Material to Options 3, Section 11

.01 It will be a violation of a Member's duty of best execution to its customer if it were to cancel a facilitation order to avoid execution of the order at a better price. The availability of the Facilitation Mechanism does not alter a Member's best execution duty to get the best price for its customer. Accordingly, while facilitation orders can be canceled during the time period given for the entry of Responses, if a Member were to cancel a facilitation order when there was a superior price available on the Exchange and subsequently re-enter the facilitation order at the same facilitation price after the better price was no longer available without attempting to obtain that better price for its customer, there would be a presumption that the Member did so to avoid execution of its customer order in whole or in part by other brokers at the better price. Additionally, any solicited contra orders entered by Members into the Facilitation Mechanism to trade against Agency Orders may not be for the account of an Exchange Market Maker that is assigned to the options class.

.02 Reserved.

.03 Under paragraph (d) above, Members may enter contra orders that are solicited. The Solicited Order Mechanism provides a facility for Members that locate liquidity for their customer orders. Members may not use the Solicited Order Mechanism to circumvent Exchange Options 3, Section 22(b) limiting principal transactions. This may include, but is not limited to, Members entering contra orders that are solicited from (1) affiliated broker-dealers, or (2) broker-dealers with which the Member has an arrangement that allows the Member to realize similar economic benefits from the solicited transaction as it would achieve by executing the customer order in whole or in part as principal. Additionally, any solicited contra orders entered by Members to trade against Agency Orders may not be for the account of an Exchange Market Maker that is assigned to the options class.

.04 Split Prices. Orders and Responses may be entered into the Facilitation and Solicitation Mechanisms and receive executions at the mid-price between the standard minimum trading increments for the options series ("Split Prices"). This means that orders and Responses for options with a minimum increment of 5 cents may be entered into the Facilitation and Solicitation Mechanisms and receive executions in 2.5 cent increments (e.g., $1.025, $1.05, $1.075, etc.), and that orders and Responses for options with a minimum increment of 10 cents may be entered into the Facilitation and Solicitation Mechanism and receive executions at 5 cent increments (e.g., $4.05, $4.10, $4.15, etc.). Orders and Responses in the market that receive the benefit of the facilitation price under paragraph (b) may also receive executions at Split Prices.

.05 Penny Prices. Orders and Responses may be entered into the Block Order Mechanism and receive executions at penny increments. Orders and quotes in the market that receive the benefit of the block execution price under paragraph (a)(2)(i) may also receive executions at penny increments.

.06 Facilitation ISO Order. A Facilitation ISO order (“Facilitation ISO”) is the transmission of two orders for crossing pursuant to paragraph (b) above without regard for better priced Protected Bids or Protected Offers (as defined in Options 5, Section 1) because the Member transmitting the Facilitation ISO to the Exchange has, simultaneously with the transmission of the Facilitation ISO, routed one or more ISOs, as necessary, to execute against the full displayed size of any Protected Bid or Protected Offer that is superior to the starting Facilitation auction price. Any execution(s) resulting from such sweeps shall accrue to the Agency order.

.07 Solicitation ISO Order. A Solicitation ISO order (“Solicitation ISO”) is the transmission of two orders for crossing pursuant to paragraph (d) above without regard for better priced Protected Bids or Protected Offers (as defined in Options 5, Section 1) because the Member transmitting the Solicitation ISO to the Exchange has, simultaneously with the transmission of the Solicitation ISO, routed one or more ISOs, as necessary, to execute against the full displayed size of any Protected Bid or Protected Offer that is superior to the starting Solicitation auction price and has swept all interest in the Exchange's book priced better than the proposed auction starting price. Any execution(s) resulting from such sweeps shall accrue to the Agency order.

.08 Complex Facilitation and Complex SOM Orders with stock/ETF components.

(a) Members may only submit Complex Facilitation Orders, Complex SOM Orders, and/or Responses with a stock/ETF component if such orders/Responses comply with the Qualified Contingent Trade Exemption from Rule 611(a) of Regulation NMS. Members submitting such orders with a stock/ETF component represent that such orders comply with the Qualified Contingent Trade Exemption. Members of FINRA or The Nasdaq Stock Market (“Nasdaq”) are required to have a Uniform Service Bureau/Executing Broker Agreement (“AGU”) with Nasdaq Execution Services, LLC (“NES”) in order to trade orders containing a stock/ETF component; firms that are not members of FINRA or Nasdaq are required to have a Qualified Special Representative (“QSR”) arrangement with NES in order to trade orders containing a stock/ETF component.

(b) Where one component of a Complex Facilitation Order, Complex SOM Order, and/or Response is the underlying security, the Exchange shall electronically communicate the underlying security component of a Complex Facilitation Order or Complex SOM Order to NES, its designated broker-dealer, for immediate execution. Such execution and reporting will not occur on the Exchange and will be handled by NES pursuant to applicable rules regarding equity trading. The execution price must be within a certain price from the current market, as determined by the Exchange pursuant to Options 3, Section 16(a). If the stock price is not within these parameters, the Complex Facilitation Order, Complex SOM Order, and/or Response is not executable and would be cancelled.

(c) When the short sale price test in Rule 201 of Regulation SHO is triggered for a covered security, NES will not execute a short sale order in the underlying covered security component of a Complex Facilitation Order, Complex SOM Order and/or Response if the price is equal to or below the current national best bid. However, NES will execute a short sale order in the underlying covered security component of a Complex Facilitation Order, Complex SOM Order and/or Response if such order is marked “short exempt,” regardless of whether it is at a price that is equal to or below the current national best bid. When a response or an unrelated limit complex order on the complex order book includes a short sale order in the underlying covered security, NES will execute such order at (1) its stated limit price if the facilitating Electronic Access Member’s contra order or the contra-side solicited Complex Order does not include a short sale order in the underlying security; or (2) its stated limit price or better if the facilitating Electronic Access Member’ contra order or the solicited contra-side Complex Order includes a short sale order in the underlying covered security. If NES cannot execute the underlying covered security component of a Complex Facilitation Order, Complex SOM Order and/or Response in accordance with Rule 201 of Regulation SHO, the Exchange will cancel back the Complex Facilitation Order, Complex SOM Order and/or Response to the entering Member. For purposes of this paragraph, the term “covered security” shall have the same meaning as in Rule 201(a)(1) of Regulation SHO.

.09 If an allocation would result in less than one contract, then one contract will be allocated.

Adopted July 8, 2019 (SR-MRX-2019-15); amended March 12, 2021 (SR-MRX-2021-01), operative April 11, 2021; amended Sep. 9, 2022 (SR-MRX-2022-16), operative Nov. 7, 2022; amended Sep. 30, 2022 (SR-MRX-2022-18), operative Nov. 7, 2022; amended Sep. 21, 2022 (SR-MRX-2022-10), operative Nov. 7, 2022; amended Oct. 21, 2022 (SR-MRX-2022-23), operative Nov. 20, 2022; amended Sep. 8, 2023 (SR-MRX-2023-16), operative Oct. 7, 2023; amended Jun. 6, 2023 (SR-MRX-2023-10), operative Oct. 17, 2023; amended Sep. 27, 2023 (SR-MRX-2023-18), operative Oct. 17, 2023; amended Feb. 6, 2025 (SR-MRX-2025-06), operative Mar. 8, 2025 (on or before Q2 2026 (Section 11(b)(3) and (d)(2)).

(a) Customer Cross Orders. Customer Cross Orders are automatically executed upon entry provided that the execution is at or between the best bid and offer on the Exchange and (i) is not at the same price as a Priority Customer Order on the Exchange's limit order book and (ii) will not trade through the NBBO.

(1) Customer Cross Orders will be automatically canceled if they cannot be executed.

(2) Customer Cross Orders may only be entered in the regular trading increments applicable to the options class under Options 3, Section 3.

(3) Supplementary Material .01 to Options 3, Section 22 applies to the entry and execution of Customer Cross Orders.

(b) Complex Customer Cross Orders. Complex Orders may be entered as Customer Cross Orders, as defined in Options 3, Section 7(i). Such orders will be automatically executed upon entry so long as: (i) the price of the transaction is at or within the best bid and offer for the same complex strategy on the Complex Order Book; (ii) there are no Priority Customer Complex Orders for the same strategy at the same price on the Complex Order Book; and (iii) the options legs can be executed at prices that comply with the provisions of Options 3, Section 14(c)(2). Complex Customer Cross Orders will be rejected if they cannot be executed. Supplementary Material .01 to Options 3, Section 22 applies to Complex Customer Cross Orders.

(1) Members may only submit Complex Customer Cross Orders with a stock/ETF component if such orders comply with the Qualified Contingent Trade Exemption from Rule 611(a) of Regulation NMS. Members submitting such orders with a stock/ETF component represent that such orders comply with the Qualified Contingent Trade Exemption. Members of FINRA or The Nasdaq Stock Market (“Nasdaq”) are required to have a Uniform Service Bureau/Executing Broker Agreement (“AGU”) with Nasdaq Execution Services, LLC (“NES”) in order to trade orders containing a stock/ETF component; firms that are not members of FINRA or Nasdaq are required to have a Qualified Special Representative (“QSR”) arrangement with NES in order to trade orders containing a stock/ETF component.

(2) Where one component of a Complex Customer Cross Order is the underlying security, the Exchange shall electronically communicate the underlying security component of a Complex Customer Cross Order to NES, its designated broker-dealer, for immediate execution. Such execution and reporting will not occur on the Exchange and will be handled by NES pursuant to applicable rules regarding equity trading. The execution price must be within a certain price from the current market, as determined by the Exchange. If the stock price is not within these parameters, the Complex Customer Cross Order is not executable.

(3) When the short sale price test in Rule 201 of Regulation SHO is triggered for a covered security, NES will not execute a short sale order in the underlying covered security component of a Complex Customer Cross Order if the price is equal to or below the current national best bid. However, NES will execute a short sale order in the underlying covered security component of a Complex Customer Cross Order if such order is marked "short exempt," regardless of whether it is at a price that is equal to or below the current national best bid. If NES cannot execute the underlying covered security component of a Complex Customer Cross Order in accordance with Rule 201 of Regulation SHO, the Exchange will cancel back the Complex Customer Cross Order to the entering Member. For purposes of this paragraph, the term “covered security” shall have the same meaning as in Rule 201(a)(1) of Regulation SHO.

(c) Qualified Contingent Cross Orders. Qualified Contingent Cross Orders are automatically executed upon entry provided that the execution (i) is not at the same price as a Priority Customer Order on the Exchange's limit order book and (ii) is at or between the better of the internal BBO or the NBBO.

(1) Qualified Contingent Cross Orders will be automatically canceled if they cannot be executed.

(2) Qualified Contingent Cross Orders may only be entered in the regular trading increments applicable to the options class under in Options 3, Section 3.

(d) Complex Qualified Contingent Cross Orders. Complex Options Orders may be entered as Qualified Contingent Cross Orders, as defined in Options 3, Section 7(j). Such orders will be automatically executed upon entry so long as: (i) the price of the transaction is at or within the best bid and offer for the same complex options strategy on the Complex Order Book; (ii) there are no Priority Customer Complex Options Orders for the same strategy at the same price on the Complex Order Book; and (iii) the options legs can be executed at prices that (A) are at or between the better of the internal BBO or the NBBO for the individual series, and (B) comply with the provisions of Options 3, Section 14(c)(2)(i), provided that no legs of the Complex Options Order can be executed at the same price as a Priority Customer Order on the Exchange in the individual options series. Complex Qualified Contingent Cross Orders will be rejected if they cannot be executed. Complex Qualified Contingent Cross Orders may be entered in one cent increments. Each leg of a Complex Options Order must meet the 1,000 contract minimum size requirement for Qualified Contingent Cross Orders.

Adopted July 8, 2019 (SR-MRX-2019-15); amended Sep. 21, 2022 (SR-MRX-2022-10), operative Nov. 7, 2022; amended Jun. 6, 2023 (SR-MRX-2023-10), operative Oct. 17, 2023; amended Dec. 3, 2024 (SR-MRX-2024-47), operative Jan. 13, 2025.

Changes have been approved, but not yet implemented. For more information, see the attached document.

(a) The Price Improvement Mechanism is a process by which an Electronic Access Member can provide price improvement opportunities for a transaction wherein the Electronic Access Member seeks to facilitate an order it represents as agent, and/or a transaction wherein the Electronic Access Member solicited interest to execute against an order it represents as agent (a "Crossing Transaction").

(b) Crossing Transaction Entry. A Crossing Transaction is comprised of the order the Electronic Access Member represents as agent (the "Agency Order") and a counter-side order for the full size of the Agency Order (the "Counter-Side Order"). The Counter-Side Order may represent interest for the Member's own account, or interest the Member has solicited from one or more other parties, or a combination of both.

(1) If the Agency Order is for less than 50 option contracts, and if the difference between the National Best Bid and National Best Offer ("NBBO") or the difference between the internal best bid and the internal best offer is $0.01, the Crossing Transaction must be entered at a price that is:

(A) $0.01 better than the NBBO and the internal BBO on the opposite side of the market from the Agency Order and

(B) on the same side of the market as the Agency Order,

(i) equal to or better than the NBBO and

(ii) better than any Limit Order or quote on the MRX order book.

(2) If the Agency Order is for the account of a Priority Customer, and such order is for 50 option contracts or more, or if the difference between the NBBO or the difference between the internal BBO is greater than $0.01, a Crossing Transaction must be entered only at a price that is:

(A) equal to or better than the internal BBO and NBBO on the opposite side of the market from the Agency Order, and

(B) on the same side of the market as the Agency Order,

(i) at least $0.01 better than any Limit Order or quote on the MRX order book, and

(ii) equal to or better than the NBBO.

(3) If the Agency Order is for the account of a broker dealer or any other person or entity that is not a Priority Customer, and such order is for 50 option contracts or more, or if the difference between the NBBO or the difference between the internal BBO is greater than $0.01, a Crossing Transaction must be entered at a price that is:

(A) equal to or better than the internal BBO or the NBBO on the opposite side of the market from the Agency Order, and

(B) on the same side of the market as the Agency Order,

(i) at least $0.01 better than any Limit Order or quote on the MRX order book, and

(ii) equal to or better than the NBBO.

(4) The Crossing Transaction may be priced in one-cent increments.

(5) The Crossing Transaction may not be canceled or modified, but the price of the Counter-Side Order may be improved during the exposure period.

(6) Crossing Transactions submitted at or before the opening of trading are not eligible to initiate an auction and will be rejected.

(c) Exposure Period. Upon entry of a Crossing Transaction into the Price Improvement Mechanism, a broadcast message that includes the series, price and size of the Agency Order, and whether it is to buy or sell, will be sent to all Members. This broadcast message will not be included in the Exchange's disseminated best bid or offer and will not be disseminated through OPRA.

(1) The Exchange will designate via an Options Trader Alert a time of no less than 100 milliseconds and no more than 1 second for Members to indicate the size and price at which they want to participate in the execution of the Agency Order ("Improvement Orders").

(2) Improvement Orders may be entered by all Members in one-cent increments at the same price as the Crossing Transaction or at an improved price for the Agency Order, and will only be considered up to the size of the Agency Order.

(3) During the exposure period, Improvement Orders may be canceled or modified.

(4) During the exposure period, responses (including the Counter-Side Order, Improvement Orders, and any changes to either) submitted by Members shall not be visible to other auction participants. Multiple Improvement Orders from the same Member may be submitted during the Auction.  Multiple Improvement Orders at a particular price point submitted by a Member in response to an exposure period may not exceed, in the aggregate, the size of the Crossing Transaction.  However, a Member using the same badge/mnemonic may only submit a single Improvement Order per auction ID for a given auction.  If an additional Improvement Order is submitted for the same auction ID from the same badge/mnemonic, then that Improvement Order will automatically replace the previous Improvement Order.

(5) The exposure period will automatically terminate (i) at the end of the time period designated by the Exchange pursuant to Options 3, Section 13(c)(1) above, (ii) any time the Exchange best bid or offer improves beyond the price of the Crossing Transaction on the same side of the market as the Agency Order ; or (iii) any time there is a trading halt on the Exchange in the affected series.

(d) Execution. At the end of the exposure period the Agency Order will be executed in full at the best prices available, taking into consideration orders and quotes in the Exchange market, Improvement Orders, and the Counter-Side Order. The Agency Order will receive executions at multiple price levels if there is insufficient size to execute the entire order at the best price.

(1) At a given price, "Priority Customer Interest" (Priority Customer Orders and Improvement Orders from Priority Customers) is executed in full before "non-Priority Customer Interest" (non-Priority Customer Orders, Improvement Orders from non-Priority Customers and Market Maker quotes).

(2) After Priority Customer Interest at a given price, non-Priority Customer Interest will participate in the execution of the Agency Order based upon the percentage of the total number of contracts available at the price that is represented by the size of such interest.

(3) In the case where the Counter-Side Order is at the same price as non-Priority Customer Interest in (d)(2), the Counter-Side order will be allocated the greater of one (1) contract or forty percent (40%) (or such lower percentage requested by the Member) of the initial size of the Agency Order before non-Priority Customer Interest is executed. Upon entry of Counter-Side Orders, Members can elect to automatically match the price and size of orders, quotes and responses received during the exposure period up to a specified limit price or without specifying a limit price. If a Member elects to auto-match, the Counter-Side Order will be allocated the aggregate size of all competing quotes, orders and Improvement Orders at each price point, or at each price point up to the specified limit price if a limit is specified, until a price point is reached where the balance of the order can be fully executed. At such price point, the Counter-Side Order shall be allocated the greater of one contract or forty percent (40%) (or such lower percentage requested by the Member) of the original size of the Agency Order, but only after Priority Customer Interest at such price point are executed in full. Thereafter, all non-Priority Customer Interest at the price point will participate in the execution of the Agency Order based upon the percentage of the total number of contracts available at the price that is represented by the size of the non-Priority Customer Interest. An election to automatically match better prices cannot be cancelled or altered during the exposure period.

(4) Unrelated market or marketable interest (against the MRX BBO) on the opposite side of the market from the Agency Order received during the exposure period will not cause the exposure period to end early and will execute against interest outside of the Crossing Transaction. If contracts remain from such unrelated order at the time the auction exposure period ends, they will be considered for participation in the order allocation process described in sub-paragraph (3).

(5) If a trading halt is initiated after an order is entered into the Price Improvement Mechanism, such auction will be automatically terminated with execution solely with the Counter-Side Order.

(6) If the PIM execution price would be the same or better than an order on the limit order book on the same side of the market as the Agency Order, the Agency Order may only be executed at a price that is at least $0.01 better than the resting order's limit price. If such resting order's limit price is equal to or crosses the initiating Crossing Transaction price, then the entire Agency Order will trade at the initiating Crossing Transaction price with all better priced counter-side interest being considered for execution at the initiating Crossing Transaction price.

(7) Under no circumstances will the initiating Member receive an allocation percentage, at the final price point, of more than 40% of the original size of the PIM Order with one or multiple competing quote(s), order(s), or Improvement Order(s), except for rounding, when competing quotes, orders, or Improvement Orders have contracts available for execution.

(e) Complex Price Improvement Mechanism. Electronic Access Members may use the Price Improvement Mechanism according to this Rule to execute Complex Orders at a net price. The Complex Price Improvement Mechanism is a process by which an Electronic Access Member can provide price improvement opportunities for a transaction wherein the Electronic Access Member seeks to facilitate a Complex Order it represents as agent, and/or a transaction wherein the Electronic Access Member solicited interest to execute against a Complex Order it represents as agent (a "Crossing Transaction").

(1) Crossing Transaction Entry. A Crossing Transaction is comprised of the order the Electronic Access Member represents as agent (the "Agency Order") and a counter-side order for the full size of the Agency Order (the "Counter-Side Order"). The Counter-Side Order may represent interest for the Member's own account, or interest the Member has solicited from one or more other parties, or a combination of both.

(2) Complex Orders must be entered into the Complex Price Improvement Mechanism at a price that is better than the best net price (i) available on the Complex Order Book on both sides of the market; and (ii) achievable from the best MRX bids and offers for the individual legs on both sides of the market (an "improved net price"). Complex Orders will be rejected unless they are entered at an improved net price.

(3) A Complex Order entered into the Complex Price Improvement Mechanism will be rejected if any component of the Complex Order has not opened for trading, or if there is a trading halt in any series underlying the Complex Order.

(4) Exposure Period. Upon entry of a Complex Order into the Complex Price Improvement Mechanism, a broadcast message that includes the net price, side and size of the Agency Complex Order will be sent to Members.

(i) The Exchange will designate via Options Trader Alert a time of no less than 100 milliseconds and no more than 1 second for Members to indicate the size and net price at which they want to participate in the execution of the Agency Complex Order ("Improvement Complex Orders"). Improvement Complex Orders may be entered by all Members for their own account or for the account of a Public Customer. Improvement Complex Orders are only executable against the Complex Order with respect to which they are entered, and will only be considered up to the size of the Agency Complex Order. Improvement Complex Orders must be entered in the increments provided in Options 3, Section 14(c)(1) at the same price as the Crossing Transaction or at a price that is at least one cent better for the Agency Complex Order.

(ii) During the exposure period, Improvement Complex Orders may be canceled or modified.

(iii) During the exposure period, responses (including the Counter-Side Order, Improvement Complex Orders, and any changes to either) submitted by Members shall not be visible to other auction participants.

(iv) The exposure period will automatically terminate (A) at the end of the time period designated by the Exchange pursuant to subparagraph (4)(i) above, (B) upon the receipt of a Complex Order in the same complex strategy on either side of the market that is marketable against the Complex Order Book or bids and offers for the individual legs, (C) upon the receipt of a non-marketable Complex Order in the same complex strategy on the same side of the market as the Agency Complex Order that would cause the execution of the Agency Complex Order to be outside of the best bid or offer on the Complex Order Book; (D) when a resting Complex Order in the same complex strategy on either side of the market becomes marketable against the Complex Order Book or bids and offers for the individual legs; or (E) if a trading halt is initiated after the order is entered into the Complex Price Improvement Mechanism, such auction will be automatically terminated without an execution.

(v) Pursuant to Supplementary Material .04 to this Rule, only one Complex Price Improvement Mechanism may be ongoing at any given time in a given complex strategy. However, a price improvement auction may be ongoing concurrently in series of individual legs of a complex strategy.

(5) Execution. At the end of the exposure period the Agency Complex Order will be executed in full at the best prices available, taking into consideration Complex Orders in the Complex Order Book, Improvement Complex Orders, the Counter-Side Order, and, for Complex Options Orders, the MRX best bids and offers on the individual legs. The Agency Complex Order will receive executions at multiple price levels if there is insufficient size to execute the entire order at the best price.

(i) At a given net price, Priority Customer interest on the Complex Order Book (i.e., Priority Customer Complex Orders and Improvement Complex Orders) is executed in full before non-Priority Customer interest (i.e., non-Priority Customer Complex Orders and Improvement Complex Orders) on the Complex Order Book.

(ii) After Priority Customer interest on the Complex Order Book at a given net price, non-Priority Customer interest on the Complex Order Book will participate in the execution of the Agency Complex Order based upon the percentage of the total number of contracts available at the price that is represented by the size of such interest.

(iii) In the case where the Counter-Side Complex Order is at the same net price as non-Priority Customer interest on the Complex Order Book in (ii) above, the Counter-Side Complex Order will be allocated the greater of one (1) contract or forty percent (40%) (or such lower percentage requested by the Member) of the initial size of the Agency Complex Order before other non-Priority Customer interest on the Complex Order Book are executed. Upon entry of Counter-Side Complex Orders, Members can elect to automatically match the price and size of Complex Orders and Improvement Complex Orders received on the Complex Order Book during the exposure period up to a specified limit net price or without specifying a limit net price. This election will also automatically match the net price available from the MRX best bids and offers on the individual legs for the full size of the order; provided that with notice to Members the Exchange may determine whether to offer this option only for Complex Options Orders, Stock-Option Orders, and/or Stock Complex Orders. If a Member elects to auto-match, the Counter-Side Complex Order will be allocated the aggregate size of all competing Complex Orders and Improvement Complex Orders at each price point, or at each price point up to the specified limit net price if a limit is specified, until a price point is reached where the balance of the order can be fully executed. At such price point, the Counter-Side Complex Order shall be allocated the greater of one contract or forty percent (40%) (or such lower percentage requested by the Member) of the original size of the Agency Complex Order, but only after Priority Customer Complex Orders and Improvement Complex Orders at such price point are executed in full. Thereafter, all non-Priority Customer Complex Orders and Improvement Complex Orders at the price point will participate in the execution of the Agency Complex Order based upon the percentage of the total number of contracts available at the price that is represented by the size of the non-Priority Customer Complex Order or Improvement Complex Order on the Complex Order Book.

(iv) When a marketable Complex Order on the opposite side of the Agency Complex Order ends the exposure period, it will participate in the execution of the Agency Complex Order at the price that is mid-way between the best counter-side interest and the same side best bid or offer on the Complex Order Book or net price from MRX best bid or offer on individual legs, whichever is better, so that both the marketable Complex Order and the Agency Complex Order receive price improvement. Transactions will be rounded, when necessary, to the $0.01 increment that favors the Agency Complex Order.

(v) With respect to bids and offers for the individual legs of a Complex Order entered into the Complex Price Improvement Mechanism, the priority rules applicable to the execution of Complex Orders contained in Options 3, Section 14(c)(2) will continue to be applicable and may prevent the execution of a Complex Order entered into the Complex Price Improvement Mechanism, in which case the transaction will be cancelled. If an improved net price for the Complex Order being executed can be achieved from Complex Orders, Improvement Complex Orders on the Complex Order Book and, for Complex Options Orders, the MRX best bids and offers on the individual legs, the Agency Complex Order will be executed against such interest.

(vi) Under no circumstances will the initiating Member receive an allocation percentage, at the final price point, of more than 40% of the original size of the Complex PIM Order with one or multiple competing Complex Order(s) or Improvement Complex Order(s), except for rounding, when competing Complex Orders or Improvement Complex Orders have contracts available for execution.

(vii) If the Complex PIM execution price would be the same or better than a Complex Order on the Complex Order Book on the same side of the market as the Agency Complex Order, for options classes assigned to allocate in time priority or pro-rata pursuant to Options 3, Section 14(d)(2), the Agency Complex Order may be executed at a price that is equal to the resting Complex Order’s limit price.

Supplementary Material to Options 3, Section 13

.01 It shall be considered conduct inconsistent with just and equitable principles of trade for any Member to enter orders, quotes, Agency Orders, Counter-Side Orders or Improvement Orders for the purpose of disrupting or manipulating the Price Improvement Mechanism. Such conduct includes, but is not limited to, engaging in a pattern of conduct where the Member submitting the Agency Order into the PIM breaks-up the Agency Order into separate orders for two (2) or fewer contracts for the purpose of gaining a higher allocation percentage than the Member would have otherwise received in accordance with the allocation procedures contained in paragraph (d) above.

.02 The Price Improvement Mechanism may only be used to execute bona fide Crossing Transactions.  It will be considered a violation of this Rule and will be deemed conduct inconsistent with just and equitable principles of trade and a violation of Options 9, Section 1 if an Electronic Access Member submits a PIM Order (initiating an auction) and also submits its own Improvement Order in the same auction.

.03 There will be no minimum size requirements for orders to be eligible for the Price Improvement Mechanism.

.04 Only one PIM may be ongoing at any given time in a series. PIMs will not queue or overlap in any manner, except as described in Options 3, Section 11(f) and (g).

.05 Pursuant to Options 3, Section 13(c)(2), Electronic Access Members may enter Improvement Orders for the account of Public Customers.

.06 Any solicited Counter-Side Orders submitted by an Electronic Access Member to trade against Agency Orders may not be for the account of an Exchange Market Maker assigned to the options class.

.07 Counter-Side Orders and Improvement Orders entered into the Price Improvement Mechanism only will execute against the Agency Order, and any unexecuted interest will be automatically cancelled.

.08 PIM ISO Order. A PIM ISO order (PIM ISO) is the transmission of two orders for crossing pursuant to this Rule without regard for better priced Protected Bids or Protected Offers (as defined in Options 5, Section 1) because the Member transmitting the PIM ISO to the Exchange has, simultaneously with the routing of the PIM ISO, routed one or more ISOs, as necessary, to execute against the full displayed size of any Protected Bid or Protected Offer that is superior to the starting PIM auction price and has swept all interest in the Exchange's book priced better than the proposed auction starting price. Any execution(s) resulting from such sweeps shall accrue to the PIM order.

.09 Complex PIM Orders with stock/ETF components.

(a) Members may only submit Complex PIM Orders and/or Improvement Orders with a stock/ETF component if such orders comply with the Qualified Contingent Trade Exemption from Rule 611(a) of Regulation NMS. Members submitting such orders with a stock/ETF component represent that such orders comply with the Qualified Contingent Trade Exemption. Members of FINRA or The Nasdaq Stock Market (“Nasdaq”) are required to have a Uniform Service Bureau/Executing Broker Agreement (“AGU”) with Nasdaq Execution Services, LLC (“NES”) in order to trade orders containing a stock/ETF component; firms that are not members of FINRA or Nasdaq are required to have a Qualified Special Representative (“QSR”) arrangement with NES in order to trade orders containing a stock/ETF component.

(b) Where one component of a Complex PIM Order and/or Improvement Order is the underlying security, the Exchange shall electronically communicate the underlying security component of a Complex PIM Order (together with the Agency Order or Improvement Order, as applicable) to NES, its designated broker-dealer, for immediate execution. Such execution and reporting will not occur on the Exchange and will be handled by NES pursuant to applicable rules regarding equity trading. The execution price must be within a certain price from the current market pursuant to Options 3, Section 16(a), as determined by the Exchange. If the stock price is not within these parameters, the Complex PIM Order and/or Improvement Order is not executable and would be cancelled.

(c) When the short sale price test in Rule 201 of Regulation SHO is triggered for a covered security, NES will not execute a short sale order in the underlying covered security component of a Complex PIM Order and/or Improvement Order if the price is equal to or below the current national best bid. However, NES will execute a short sale order in the underlying covered security component of a Complex PIM Order and/or Improvement Order if such order is marked “short exempt,” regardless of whether it is at a price that is equal to or below the current national best bid. When an Improvement Order or an unrelated limit complex order on the complex order book includes a short sale order in the underlying covered security, NES will execute such order at (1) its stated limit price if the Counter-Side Order does not include a short sale order in the underlying security; or (2) its stated limit price or better if the Counter-Side Order includes a short sale order in the underlying covered security. If NES cannot execute the underlying covered security component of a Complex PIM Order and/or Improvement Order in accordance with Rule 201 of Regulation SHO, the Exchange will cancel back the Complex PIM Order and/or Improvement Order to the entering member. For purposes of this paragraph, the term “covered security” shall have the same meaning as in Rule 201(a)(1) of Regulation SHO.

.10 If an allocation would result in less than one contract, then one contract will be allocated.

Adopted July 8, 2019 (SR-MRX-2019-15); amended March 12, 2021 (SR-MRX-2021-01), operative April 11, 2021; amended Sep. 9, 2022 (SR-MRX-2022-16), operative Nov. 7, 2022; amended Sep. 30, 2022 (SR-MRX-2022-18), operative Nov. 7, 2022; amended Sep. 21, 2022 (SR-MRX-2022-10), operative Nov. 7, 2022; amended Sep. 8, 2023 (SR-MRX-2023-16), operative Oct. 7, 2023; amended Jun. 6, 2023 (SR-MRX-2023-10), operative Oct. 17, 2023; amended Sep. 27, 2023 (SR-MRX-2023-18), operative Oct. 17, 2023; amended Feb. 6, 2025 (SR-MRX-2025-06), operative Mar. 8, 2025 (on or before Q2 2026 (Section 13(c)(2), and on or before the end of Q2 2026 (Section 13(b)(1) and (b)(2)).

(a) Definitions.

(1) Complex Options Strategy. A Complex Options Strategy is the simultaneous purchase and/or sale of two or more different options series in the same underlying security, for the same account, in a ratio that is equal to or greater than one-to-three (.333) and less than or equal to three-to-one (3.00) and for the purpose of executing a particular investment strategy. Only those Complex Options Strategies with no more than the applicable number of legs, as determined by the Exchange on a class-by-class basis, are eligible for processing.

(2) Stock-Option Strategy. A Stock-Option Strategy is the purchase or sale of a stated number of units of an underlying stock or a security convertible into the underlying stock ("convertible security") coupled with the purchase or sale of options contract(s) on the opposite side of the market representing either (A) the same number of units of the underlying stock or convertible security, or (B) the number of units of the underlying stock necessary to create a delta neutral position, but in no case in a ratio greater than eight-to-one (8.00), where the ratio represents the total number of units of the underlying stock or convertible security in the option leg to the total number of units of the underlying stock or convertible security in the stock leg.

(3) Stock-Complex Strategy. A Stock-Complex Strategy is the purchase or sale of a stated number of units of an underlying stock or a security convertible into the underlying stock ("convertible security") coupled with the purchase or sale of a Complex Options Strategy on the opposite side of the market representing either (A) the same number of units of the underlying stock or convertible security, or (B) the number of units of the underlying stock necessary to create a delta neutral position, but in no case in a ratio greater than eight-to-one (8.00), where the ratio represents the total number of units of the underlying stock or convertible security in the option legs to the total number of units of the underlying stock or convertible security in the stock leg. Only those Stock-Complex Strategies with no more than the applicable number of legs, as determined by the Exchange on a class-by-class basis, are eligible for processing.

(4) The term "complex strategy" includes Complex Options Strategies, Stock-Option Strategies, and Stock-Complex Strategies.

(5) The terms "Complex Options Order," "Stock-Option Order," and "Stock-Complex Order" refer to orders for a Complex Options Strategy, Stock-Option Strategy, and Stock-Complex Strategy, respectively. The term "Complex Order" includes Complex Options Orders, Stock-Option Orders, and Stock-Complex Orders.

(b) Types of Complex Orders. Unless otherwise specified, the definitions used below have the same meaning contained in Options 3, Section 7. The Exchange may determine to make certain order types and/or times-in-force available on a class or System basis. Complex Orders may be entered using the following orders or designations:

(1) Market Complex Order. A Market Complex Order is a Complex Order to buy or sell a complex strategy that is to be executed at the best price obtainable. If not executable upon entry, such orders will rest on the Complex Order Book unless designated as fill-or-kill or immediate-or-cancel.

(2) Limit Complex Order. A Limit Complex Order is a Complex Order to buy or sell a complex strategy that is entered with a limit price expressed as a net purchase or sale price for the components of the order.

(3) All-Or-None Complex Order. A Complex Order may be designated as an All-or-None Order that is to be executed in its entirety or not at all. An All-Or-None Order may only be entered as an Immediate-or-Cancel Order.

(4) Attributable Complex Order. A Market or Limit Complex Order may be designated as an Attributable Order as provided in Options 3, Section 7(h).

(5) Customer Cross Complex Order. A Customer Cross Complex Order is comprised of a Priority Customer Complex Order to buy and a Priority Customer Complex Order to sell at the same price and for the same quantity. Such orders will trade in accordance with Options 3, Section 12(b).

(6) Qualified Contingent Cross Complex Order. A Complex Options Order may be entered as a Qualified Contingent Cross Order, as defined in Options 3, Section 7(j). Qualified Contingent Cross Complex Orders will trade in accordance with Options 3, Section 12(d).

(7) Day Complex Order. A Complex Order may be designated as a Day Order that if not executed, expires at the end of the day on which it was entered.

(8) Fill-or-Kill Complex Orders. A Complex Order may be designated as a Fill-or-Kill Order that is to be executed in its entirety as soon as it is received and, if not so executed, cancelled.

(9) Immediate-or-Cancel Complex Orders. A Complex Order may be designated as an Immediate-or-Cancel Order that is to be executed in whole or in part upon receipt. Any portion not so executed is cancelled.

(10) Opening Only Complex Order. An Opening Only Complex Order is a Complex Order that may be entered for execution during the Complex Opening Process described in Supplementary Material .04 to Options 3, Section 14. Any portion of the order that is not executed during the Complex Opening Process is cancelled.

(11) Good-Till-Date Complex Order. A Good-Till-Date Complex Order is an order to buy or sell which, if not executed, will be cancelled at the sooner of the end of the expiration date assigned to the Complex Order, or the expiration of any individual series comprising the order.

(12) Good-Till-Cancel Complex Order. A Good-Till-Cancel Complex Order is an order to buy or sell that remains in force until the order is filled, canceled or any series of the order expires; provided, however, that a Good-Till-Cancel Complex Order will be cancelled in the event of a corporate action that results in an adjustment to the terms of any series underlying the Complex Order.

(13) Exposure Complex Order. An Exposure Complex Order is an order that will be exposed upon entry as provided in Supplementary Material .01 to this Rule if eligible, or entered on the Complex Order Book if not eligible. Any unexecuted balance of an Exposure Complex Order remaining upon the completion of the exposure process will be entered on the Complex Order Book.

(14) Exposure Only Complex Order. An Exposure Only Complex Order is an order that will be exposed upon entry as provided in Supplementary Material .01 to this Rule if eligible, or cancelled if not eligible. Any unexecuted balance of an Exposure Only Complex Order remaining upon the completion of the exposure process will be cancelled.

(15) Reserved.

(16) Complex Facilitation Order. A Complex Facilitation Order is an order entered into the Complex Facilitation Mechanism as described in Options 3, Section 11(c).

(17) Complex SOM Order. A Complex SOM Order is an order entered into the Complex Solicited Order Mechanism as described in Options 3, Section 11(e).

(18) Complex PIM Order. A Complex PIM Order is an order entered into the Complex Price Improvement Mechanism as described in Options 3, Section 13(e).

(19) Complex Preferenced Order.  A Complex Preferenced Order is a Complex Order for which an Electronic Access Member has designated a Preferred Market Maker as described in Options 2, Section 10.  The component leg(s) of a Complex Order with a Preferenced Order instruction may allocate pursuant to Options 3, Section 10(c)(1)(C) when the Complex Preferenced Order legs into the single-leg market provided that the Preferred Market Maker is quoting at the better of the internal BBO or the NBBO for a component leg(s) of the Complex Preferenced Order at the time the Complex Preferenced Order is received.  A Preferred Market Maker will not receive an allocation pursuant to Options 3, Section 10(c)(1)(C) for a component leg(s) of a Complex Preferenced Order if the Preferred Market Maker is not quoting at the better of the internal BBO or the NBBO for that leg at the time the Complex Preferenced Order is received.

(20) Cancel-Replacement Complex Order.  Cancel-Replacement Complex Orders shall mean a single message for the immediate cancellation of a previously received Complex Order and the replacement of that Complex Order with a new Complex Order.  If the previously placed Complex Order is already filled partially or in its entirety, the replacement Complex Order is automatically canceled or reduced by the number of contracts that were executed.  The replacement Complex Order will retain the priority of the cancelled Complex Order, if the order posts to the Complex Order Book, provided the price is not amended or size is not increased.

(c) Applicability of Exchange Rules. Except as otherwise provided in this Rule, complex strategies shall be subject to all other Exchange Rules that pertain to orders and quotes generally.

(1) Minimum Increments. Bids and offers for Complex Options Strategies may be expressed in one cent ($0.01) increments, and the options leg of Complex Options Strategies may be executed in one cent ($0.01) increments, regardless of the minimum increments otherwise applicable to the individual options legs of the order. Bids and offers for Stock-Option Strategies or Stock-Complex Strategies may be expressed in any decimal price determined by the Exchange, and the stock leg of a Stock-Option Strategy or Stock-Complex Strategy may be executed in any decimal price permitted in the equity market. The options leg of a Stock-Option Strategy or Stock-Complex Strategy may be executed in one cent ($0.01) increments, regardless of the minimum increments otherwise applicable to the individual options legs of the order.

(2) Complex Order. Complex strategies will not be executed at prices inferior to the best net price achievable from the best MRX bids and offers for the individual legs. Notwithstanding the provisions of Options 3, Section 10:

(i) a Complex Options Strategies may be executed at a total credit or debit price with one other Member without giving priority to bids or offers established on the Exchange that are no better than the bids or offers in the individual options series comprising such total credit or debit; provided, however, that if any of the bids or offers established on the Exchange consist of a Priority Customer Order, the price of at least one leg of the complex strategy must trade at a price that is better than the corresponding bid or offer on the Exchange by at least one minimum trading increment for the series as defined in Options 3, Section 3.

(ii) The option leg of a Stock-Option Strategy has priority over bids and offers for the individual options series established on the Exchange by Professional Orders and market maker quotes that are no better than the price of the options leg, but not over such bids and offers established by Priority Customer Orders.

(iii) The options legs of a Stock-Complex Strategy are executed in accordance with subparagraph (c)(2)(i) above.

(3) Internalization. Complex Orders represented as agent may be executed (i) as principal as provided in Options 3, Section 22(b), or (ii) against orders solicited from Members and non-Member broker-dealers as provided in Options 3, Section 22(c). The exposure requirements of Options 3, Section 22(b) or (c) must be met on the Complex Order Book unless the order is executed in one of the mechanisms described in Options 3, Sections 11, 12 and 13.

(d) Execution of Complex Strategies. Complex strategies will be executed without consideration of any prices that might be available on other exchanges trading the same options contracts. Complex strategies are not executable unless all of the terms of the strategy can be satisfied and the options legs can be executed at prices that comply with the provisions of paragraph (c)(2) above. Complex strategies, other than those that are executed as crossing transactions pursuant to Options 3, Sections 11, 12 and 13, are automatically executed as follows:

(1) Each Complex Order must specify upon entry whether it should be exposed upon entry if eligible, or whether such Complex Order should be processed without being exposed. Eligible incoming Complex Orders that are designated for exposure will be exposed for price improvement pursuant to Supplementary Material .01 to this Rule.

(2) Complex Options Orders will be executed at the best net price available from Complex Order Exposure pursuant to Supplementary Material .01 to this Rule, executable Complex Orders on the Complex Order Book, and bids and offers for the individual options series; provided that at each price, executable Complex Options Orders will be automatically executed first against executable bids and offers on the Complex Order book prior to legging in the single leg order book. Notwithstanding the foregoing, executable Complex Options Orders will execute against Priority Customer interest on the single leg book at the same price before executing against the Complex Order Book. Thus, Priority Customer Orders on the single leg order book shall retain priority and will execute prior to any other Complex Order or non-Priority Customer single leg interest at the same price. Stock Option Orders and Stock Complex Orders will be executed at the best net price available from Complex Order Exposure pursuant to Supplementary Material .01 to this Rule and executable Complex Orders on the Complex Order Book. The Exchange may designate on a class basis whether bids and offers at the same price on the Complex Order Book will be executed:

(i) in time priority; or

(ii) pro-rata based on size.

(3) If there is no executable contra-side complex interest on the Complex Order Book at a particular price, executable Complex Options Orders up to a maximum number of legs (determined by the Exchange on a class basis as either two legs, three legs or four legs) may be automatically executed against bids and offers on the Exchange for the individual options series provided the Complex Order can be executed in full or in a permissible ratio by such bids and offers. Legging orders may be automatically generated on behalf of Complex Options Orders so that they are represented at the best bid and/or offer on the Exchange for the individual legs of the Complex Options Order as provided in Options 3, Section 7(k). Notwithstanding the foregoing:

(A) Complex Orders with 2 option legs where both legs are buying or both legs are selling and both legs are calls or both legs are puts may only trade against other Complex Orders in the Complex Order Book. The System will not generate legging orders for these Complex Orders.

(B) Complex Orders with 3 or 4 option legs where all legs are buying or all legs are selling may only trade against other Complex Orders in the Complex Order Book.

(4) Complex strategies that are not executable may rest on the Complex Order Book until they become executable.

Supplementary Material to Options 3, Section 14

.01 Complex Order Exposure. If designated by a Member for exposure, eligible Complex Orders are exposed upon entry for a period of up to one (1) second as follows:

(a) A Complex Order that improves upon the best price for the same complex strategy on the Complex Order Book (i.e., a limit order to buy priced higher than the best bid, a limit order to sell priced lower than the best offer, and a market order to buy or sell) is eligible to be exposed upon entry for a period of up to one (1) second as provided in Supplementary Material .01 to this Rule. Incoming orders will not be eligible to be exposed if there are market orders on the Complex Order Book on the same side of the market for the same complex strategy.

(b) Upon entry of an eligible Complex Order, a broadcast message that includes net price or at market, size, and side will be sent and Members will be given an opportunity to enter Responses with the prices and sizes at which they are willing to participate in the execution of the Complex Order.

(i) Responses are only executable against the Complex Order with respect to which they are entered, can be modified or withdrawn at any time prior to the end of the exposure period, and will be considered up to the size of the Complex Order being exposed. During the exposure period, the Exchange will broadcast the best Response price, and the aggregate size of Responses available at that price. At the conclusion of the exposure period, any unexecuted balance of a Response is automatically cancelled.

(ii) The exposure period for a Complex Order will end immediately: (A) upon the receipt of a Complex Order for the same complex strategy on either side of the market that is marketable against the Complex Order Book or bids and offers for the individual legs; (B) upon the receipt of a non-marketable Complex Order for the same complex strategy on the same side of the market that would cause the price of the exposed Complex Order to be outside of the best bid or offer for the same complex strategy on the Complex Order Book; or (C) when a resting Complex Order for the same complex strategy on either side of the market becomes marketable against interest on the Complex Order book or bids and offers for same individual legs of the complex strategy.

(c) At the end of the exposure period, if the Complex Order still improves upon the best price for the complex strategy on the same side of the market, it is automatically executed to the greatest extent possible pursuant to subparagraph (d)(2)-(3), taking into consideration: (i) bids and offers on the Complex Order Book (including interest received during the exposure period), (ii) bids and offers on the Exchange for the individual options series (including interest received during the exposure period), and (iii) Responses received during the exposure period, provided that when allocating pursuant to subparagraph (d)(2)(ii), Responses are allocated pro-rata based on size. Thereafter, any unexecuted balance will be placed on the Complex Order Book (or cancelled in the case of an Exposure Only Complex Order). Notwithstanding the foregoing, Supplementary Material .01(c)(ii) to this Rule shall not be applicable with respect to Stock Option Orders and Stock Complex Orders.

(d) If a trading halt is initiated during the exposure period in any series underlying the Complex Order, the Complex Order exposure process will be automatically terminated without execution.

.02 Stock-Option and Stock-Complex Orders. The Exchange will electronically communicate the stock leg of an executable Stock-Option Order and Stock-Complex Order to NES for execution. To execute Stock-Option Orders and Stock-Complex Orders on the Exchange, Members must enter into a brokerage agreement with NES. The Exchange will automatically transmit the stock leg of a trade to NES.

.03 Reserved.

.04 Complex Opening Process. After each of the individual component legs have opened, or reopened following a trading halt, Complex Options Strategies, Stock-Option Strategies and Stock-Complex Strategies will be opened pursuant to the Complex Opening Price Determination described in Supplementary Material .05 to this Rule.

.05 Complex Opening Price Determination.

(a) Definitions.

(1) "Boundary Price" is described herein in paragraph (d)(1).

(2) "Opening Price" is described herein in paragraph (d)(3).

(3) "Potential Opening Price" is described herein in paragraph (d)(3).

(b) Eligible Interest. Eligible interest during the Complex Opening Price Determination includes Complex Orders on the Complex Order Book. Bids and offers for the individual legs of the complex strategy are not eligible to participate in the Complex Opening Price Determination.

(c) If the best bid for a complex strategy does not lock or cross the best offer, there will be no trade in the Complex Opening Price Determination and the complex strategy will open pursuant to the Complex Uncrossing Process described in Supplementary Material .06(b) to this Rule.

(d) If the best bid for a complex strategy locks or crosses the best offer, the System will open the complex strategy as follows:

(1) Boundary Prices. The System calculates Boundary Prices at or within which Complex Orders may be executed during the Complex Opening Price Determination based on the NBBO for the individual legs; provided that, if the NBBO for any leg includes a Priority Customer Order on the Exchange, the System adjusts the Boundary Prices according to subparagraph (c)(2).

(2) Potential Opening Price. The System will calculate the Potential Opening Price by identifying the price(s) at which the maximum number of contracts can trade ("maximum quantity criterion") taking into consideration all eligible interest pursuant to Supplementary Material .05(b) to this Rule.

(3) Opening Price Determination. When interest crosses and does not match in size, the System will calculate the Potential Opening Price based on the highest (lowest) executable offer (bid) price when the larger sized interest is offering (bidding), provided, however, that if there is more than one price at which the interest may execute, the Potential Opening Price when the larger sized interest is offering (bidding) shall be the mid-point of the highest (lowest) executable offer (bid) price and the next available executable offer (bid) price rounded, if necessary, down (up) to the closest minimum trading increment; or 

When interest crosses and is equal in size, the System will calculate the Potential Opening Price based on the mid-point of lowest executable bid price and the highest executable offer price, rounded, if necessary, up to the closest minimum trading increment. 

(A) Executable bids/offers include any interest which could be executed at the Potential Opening Price without trading through residual interest or the Boundary Price or without trading at the Boundary Price where there is Priority Customer interest at the best bid or offer for any leg, consistent with paragraph Options 3, Section 14(c)(2). 

(B) Executable bids/offers will be bounded by the Boundary Price on the contra-side of the interest, for determination of the Potential Opening Price described above. 

(4) Opening Price. If the Potential Opening Price is at or within the Boundary Prices, the Potential Opening Price becomes the Opening Price and the complex strategy will open pursuant to Supplementary Material .05(d)(5) to this Rule.  If the bid Boundary Price is higher than the offer Boundary Price, or if no valid Potential Opening Price can be found at or within the Boundary Prices, there will be no trade in the Complex Opening Price Determination and the complex strategy will open pursuant to the Complex Uncrossing Process described in Supplementary Material .06(b) to this Rule.

(5) Allocation. During the Complex Opening Price Determination, where there is an execution possible, the System will give priority to Market Complex Orders first, then to resting Limit Complex Orders on the Complex Order Book. The allocation provisions of subparagraph (d)(2) apply with respect to Complex Orders with the same price with priority given first to better priced interest.

(6) Uncrossing. If the Complex Order Book remains locked or crossed following paragraphs (d)(1) - (5), the System will process any remaining Complex Orders, including Opening Only Complex Orders in accordance with the Complex Uncrossing Process described in Supplementary Material .06(b) to this Rule. Bids and offers for the individual legs of the Complex Option Order will also be eligible to trade in the Complex Uncrossing Process.

.06 Complex Uncrossing Process.

(a) The Complex Order Book will be uncrossed using the Complex Uncrossing Process described in paragraph (b) below if a resting Complex Order that is locked or crossed with other interest becomes executable during regular trading or as part of the Complex Opening Process.

(b) Complex Strategies are uncrossed using the following procedure:

(1) The System identifies the oldest Complex Order among the best priced bids and offers on the Complex Order Book. A Complex Order entered with an instruction that it must be executed at a price that is equal to or better than the national best bid or offer pursuant to paragraph (a) above is considered based on its actual limit or market price and not the price of the national best bid or offer for the component legs.

(2) The selected Complex Order is matched pursuant to subparagraph (d)(2)-(3) with resting contra-side interest on the Complex Order Book and, for Complex Option Orders, bids and offers for the individual legs of the complex strategy.

(3) The process described in (1) through (2) is repeated until the Complex Order Book is no longer executable.

.07 Qualified Contingent Trade Exemption. Members may only submit Complex Orders in Stock-Option Strategies and Stock-Complex Strategies if such Complex Orders comply with the Qualified Contingent Trade Exemption from Rule 611(a) of Regulation NMS under the Exchange Act. Members submitting Complex Orders in Stock-Option Strategies and Stock-Complex Strategies represent that they comply with the Qualified Contingent Trade Exemption. Members of FINRA or The Nasdaq Stock Market (“Nasdaq”) are required to have a Uniform Service Bureau/Executing Broker Agreement (“AGU”) with Nasdaq Execution Services, LLC (“NES”) in order to trade Complex Orders in Stock-Option Strategies and Stock-Complex Strategies; firms that are not members of FINRA or Nasdaq are required to have a Qualified Special Representative (“QSR”) arrangement with NES in order to trade Complex Orders in Stock-Option Strategies and Stock-Complex Strategies. In addition, the stock leg of a stock-option order must be marked "buy," "sell," "sell short," or "sell short exempt" in compliance with Regulation SHO under the Exchange Act.

Adopted July 8, 2019 (SR-MRX-2019-15); amended March 9, 2020 (SR-MRX-2020-06); amended March 12, 2021 (SR-MRX-2021-01), operative April 11, 2021; amended Sep. 21, 2022 (SR-MRX-2022-10), operative Nov. 7, 2022; amended Jun. 6, 2023 (SR-MRX-2023-10), operative Oct. 17, 2023; amended Dec. 3, 2024 (SR-MRX-2024-47), operative Jan. 13, 2025; amended Feb. 6, 2025 (SR-MRX-2025-06), operative Mar. 8, 2025.

(a) The following risk protections are automatically enforced by the System. In the event of unusual market conditions and in the interest of a fair and orderly market, the Exchange may temporarily establish the levels at which the order protections contained in this paragraph are triggered as necessary and appropriate.

(1) The following are order risk protections on MRX:

(A) Order Price Protection ("OPP"). OPP is a feature of the System that prevents limit orders at prices outside of pre-set standard limits from being accepted by the System. OPP applies to all options but does not apply to Stop-Limit Orders until elected.

(i) OPP is operational each trading day after the opening until the close of trading, except during trading halts. OPP may be temporarily deactivated on an intra-day basis at the Exchange's discretion.

(ii) OPP will reject incoming orders that exceed certain parameters according to the following algorithm:

(a) If the better of the NBBO or the internal market BBO (the "Reference BBO") on the contra-side of an incoming order is greater than $1.00, orders with a limit more than the greater of the below will cause the order to be rejected by the System upon receipt.

(1) 50% less (greater) than such contra-side Reference Best Bid (Offer); or

(2) a configurable dollar amount not to exceed $1.00 less (greater) than such contra-side Reference Best Bid (Offer) as specified by the Exchange announced via an Options Trader Alert.

(b) If the Reference BBO on the contra-side of an incoming order is less than or equal to $1.00, orders with a limit more than the greater of the below will cause the order to be rejected by the System upon receipt.

(1) 100% less (greater) than such contra-side Reference Best Bid (Offer); or

(2) a configurable dollar amount not to exceed $1.00 less (greater) than such contra-side Reference Best Bid (Offer) as specified by the Exchange announced via an Options Trader Alert.

(B) Market Order Spread Protection. Market Orders will be rejected if the NBBO is wider than a preset threshold at the time the order is received by the System. Market Order Spread Protection shall not apply to the Opening Process or during a trading halt. The Exchange may establish different thresholds for one or more series or classes of options.

(C) Market Wide Risk Protection. All Members must provide parameters for the order entry and execution rate protections described in this Rule. The Exchange will also establish default values for each of these parameters that apply to Members that do not submit the required parameters, and will announce these default values in an Options Trader Alert to be distributed to Members. The System will maintain one or more counting programs for each Member that count orders entered and contracts traded on Nasdaq MRX. Members can use multiple counting programs to separate risk protections for different groups established within the Member. The counting programs will maintain separate counts, over rolling time periods specified by the Member for each count, of: (1) the total number of orders entered in the regular order book; (2) the total number of Complex Option Orders entered in the complex order book; (3) the total number of Stock-Option and Stock-Complex Orders entered into the complex order book; (4) the total number of contracts traded in regular orders; (5) the total number of contracts traded in Complex Options Orders; and (6)  the total number of contracts traded in Stock-Option and Stock-Complex Orders entered into the complex order book. The minimum and maximum duration of the applicable time period will be established by the Exchange and announced via an Options Trader Alert.

(i) If, during the applicable time period, the Member exceeds thresholds that it has set for any of the order entry or execution counts described above on Nasdaq MRX, the System will automatically reject all subsequent incoming orders entered by the member on Nasdaq MRX.

(ii) Members may also choose to have the System automatically cancel all of their existing orders on Nasdaq MRX when the Market Wide Risk Protection is triggered.

(iii) The Market Wide Risk Protection will remain engaged until the Member manually notifies the Exchange to enable the acceptance of new orders. For Members that still have open orders on the book that have not been cancelled pursuant to subparagraph (ii) above, the System will continue to allow those Members to interact with existing orders entered before the protection was triggered, including sending cancel order messages and receiving trade executions for those orders.

(2) The following are order and quote risk protections on MRX:

(A) Acceptable Trade Range.

(i) After the Opening Process, the System will calculate an Acceptable Trade Range to limit the range of prices at which an order or quote will be allowed to execute. The Acceptable Trade Range is calculated by taking the reference price, plus or minus a value to be determined by the Exchange (i.e., the reference price - (x) for sell orders/quotes and the reference price + (x) for buy orders or quotes). The Acceptable Trade Range will not be available for All-or-None Orders.

(ii) Upon receipt of a new order or quote, the reference price is the better of the NBB or internal best bid for sell orders/quotes and the better of the NBO or internal best offer for buy orders/quotes or the last price at which the order/quote is posted, whichever is higher for a buy order/quote or lower for a sell order/quote.

(iii) If an order or quote reaches the outer limit of the Acceptable Trade Range (the “Threshold Price”) without being fully executed , it will be posted at the Threshold Price for a brief period, not to exceed one second (“Posting Period”), to allow more liquidity to be collected.  Upon posting, either the current Threshold Price of the order/quote or an updated NBB for buy orders/quotes or the NBO for sell orders/quotes (whichever is higher for a buy order/quote or lower for a sell order/quote) then becomes the reference price for calculating a new Acceptable Trade Range.  If the order/quote remains unexecuted after the Posting Period, a new Acceptable Trade Range will be calculated and the order/quote will execute, route, or post up to the new Threshold Price, unless a Member has requested that their quotes or orders be returned if the quotes/orders would post at the outer limit of the Acceptable Trade Range (in which case, the quotes/orders will be returned). This process will repeat until either (1) the order/quote is executed, cancelled, or posted at its limit price or (2) the order/quote has been subject to a configurable number of instances of the Acceptable Trade Range as determined by the Exchange (in which case it will be returned).

(iv) During the Posting Period, the Exchange will disseminate as a quotation: (1) the Threshold Price for the remaining size of the order/quote triggering the Acceptable Trade Range and (2) on the opposite side of the market, the best price will be displayed using the “non-firm” indicator message in accordance with the specifications of the network processor. Following the Posting Period, the Exchange will return to a normal trading state and disseminate its best bid and offer.

(v) There will be three categories of options for Acceptable Trade Range: (1) Penny Interval Program Options trading in one cent increments for options trading at less than $3.00 and increments of five cents for options trading at $3.00 or more, (2) Penny Interval Program Options trading in one-cent increments for all prices, and (3) Non-Penny Interval Program Options.

(B) Size Limitation. There is a limit on the number of contracts an incoming order or quote may specify. Orders or quotes that exceed the maximum number of contracts are rejected. The maximum number of contracts, which shall not be less than 10,000, is established by the Exchange from time-to-time.

(3) The following are Market Maker risk protections on MRX:

(A) Anti-Internalization. Quotes and orders entered by Market Makers will not be executed against quotes and orders entered on the opposite side of the market by the same Market Maker using the same Market Maker identifiers, or alternatively, if selected by the Member, the same Exchange account number or Member firm identifier. In such a case, the System will cancel the resting quote or order back to the entering party prior to execution. This functionality shall not apply in any auction, during an Opening Process, or with respect to Complex Order transactions.

(B) Automated Quotation Adjustments.

(i) Rapid Fire. Market Makers are required to utilize the Percentage, Volume, Delta and Vega Thresholds, each a Threshold, described in (a) - (d) below. For each of these features, the System will automatically remove a Market Maker's quotes in all series in an options class when any of the Percentage Threshold, Volume Threshold, Delta Threshold or Vega Threshold, as described below, has been exceeded. A Market Maker is required to specify a period of time not to exceed 30 seconds ("Specified Time Period") during which the System will automatically remove a Market Maker's quotes in all series of an options class. The Specified Time Period will commence for an options class every time an execution occurs in any series in such option class and will continue until the System removes quotes as described in (iii) or (iv) or the Specified Time Period expires. The Specified Time Period operates on a rolling basis among all series in an options class in that there may be Specified Time Periods occurring simultaneously for each Threshold and such Specified Time Periods may overlap. The Specified Time Periods will be the same value for each protection described in (a) - (d) below.

(a) Percentage Threshold. A Market Maker must provide a specified percentage ("Percentage Threshold"), of not less than 1%, by which the System will automatically remove a Market Maker's quotes in all series of an options class. For each series in an options class, the System will determine (i) during a Specified Time Period and for each side in a given series, a percentage calculated by dividing the size of a Market Maker's quote size executed in a particular series (the numerator) by the Marker Maker's quote size available at the time of execution plus the total number of the Market Marker's quote size previously executed during the unexpired Specified Time Period (the denominator) ("Series Percentage"); and (ii) the sum of the Series Percentage in the options class ("Issue Percentage") during a Specified Time Period. The System tracks and calculates the net impact of positions in the same options class; long call percentages are offset by short call percentages, and long put percentages are offset by short put percentages in the Issue Percentage. If the Issue Percentage exceeds the Percentage Threshold the System will automatically remove a Market Maker's quotes in all series of the options class during the Specified Time Period.

(b) Volume Threshold. A Market Maker must provide a Volume Threshold by which the System will automatically remove a Market Maker's quotes in all series of an options class when the Market Maker executes a number of contracts which exceeds the designated number of contracts in all series in an options class.

(c) Delta Threshold. A Market Maker must provide a Delta Threshold by which the System will automatically remove a Market Maker's quotes in all series of an options class. For each class of options, the System will maintain a Delta counter, which tracks the absolute value of the difference between (i) purchased call contracts plus sold put contracts and (ii) sold call contracts plus purchased put contracts. If the Delta counter exceeds the Delta Threshold established by the Member, the System will automatically remove a Market Maker's quotes in all series of the options class.

(d) Vega Threshold. A Market Maker must provide a Vega Threshold by which the System will automatically remove a Market Maker's quotes in all series of an options class. For each class of options, the System will maintain a Vega counter, which tracks the absolute value of purchased contracts minus sold contracts. If the Vega counter exceeds the Vega Threshold established by the Member, the System will automatically remove a Market Maker's quotes in all series of the options class.

(ii) Active Quote Protection. In lieu of Rapid Fire, a Market Maker may provide an executed contract limit (“Contract Limit”) that, if exceeded, the System will automatically remove the Market Maker’s quotes in all series of an options class submitted through SQF. The System will apply the Contract Limit for the duration of the trading day. For each class of options, the System will maintain an active limit counter that will track the current number of contracts executed through the Market Maker’s quotes (“Limit Counter”). If the Limit Counter exceeds the Contract Limit established by the Market Maker, the System will automatically remove the Market Maker’s quotes as described in Section 15(a)(3)(B)(iii). Market Makers may submit a request (i) to decrement their Limit Counter by a specified number of contracts, or (ii) to fully decrement their Limit Counter to zero, including to re-enter the System as described in Section 15(a)(3)(B)(v). For Market Makers that elect to utilize the Contract Limit, the Percentage Threshold, Volume Threshold, Delta Threshold, and Vega Threshold will not be available for use on the Market Maker’s badge.

(iii) The System will automatically remove quotes in all series of an options class when the Percentage Threshold, Volume Threshold, Delta Threshold, Vega Threshold, or the Contract Limit has been exceeded. The System will send a Purge Notification Message to the Market Maker for all affected series when the above thresholds have been exceeded.

(a) The Percentage Threshold, Volume Threshold, Delta Threshold, Vega Threshold, and Contract Limit are considered independently of each other.

(b) The System will execute any marketable orders or quotes that are executable against a Market Maker’s quote and received prior to the time the Percentage Threshold, Volume Threshold, Delta Threshold, Vega Threshold, or Contract Limit is triggered up to the size of the Market Maker’s quote, even if such execution results in executions in excess of the Market Maker’s applicable Threshold or Contract Limit with respect to any parameter.

(iv) Notwithstanding subparagraph (b)(3)(B)(i) and (iii) above, if a Market Maker requests the System to remove quotes in all series of an options class, the System will automatically reset all Thresholds.

(v) When the System removes quotes as a result of exceeding the Percentage Threshold, Volume Threshold, Delta Threshold or Vega Threshold, the Market Maker must send a re-entry indicator to re-enter the System. When the System removes quotes as a result of exceeding the Contract Limit, the Market Maker must submit a request to fully decrement their Limit Counter to zero in order to re-enter the System.

(vi) If a Market Maker does not provide a parameter for each of the automated quotation removal protections described in (B)(i)(a) - (d) and (B)(ii) above, the Exchange will apply default parameters, which are announced to Members.

(vii) Market-Wide Speed Bump. In addition to the automated quotation removal protections described in (B)(i)(a) - (d) and (B)(ii) above, a Market Maker must provide a market wide parameter by which the Exchange will automatically remove a Market Maker's quotes in all classes when, during a time period established by the Market Maker, the total number of quote removal events specified in (B)(i)(a) - (d) and (B)(ii) exceeds the market wide parameter provided to the Exchange by the Market Maker. Market Makers must request the Exchange enable re-entry by contacting the Exchange's Operations Department.

(C) Post-Only Quoting Protection.  Market Makers may elect to configure their SQF protocols to prevent their quotes from removing liquidity (“Post-Only Quote Configuration”).  A Post-Only Quote Configuration would re-price or cancel a Market Maker’s quote that would otherwise lock or cross any resting order or quote on the order book upon entry.  When configured for re-price, quotes would be re-priced and displayed by the System to one minimum price variation below the current best offer (for bids) or above the current best bid (for offers).  Notwithstanding the aforementioned, if a quote with a Post-Only Quote Configuration would not lock or cross an order or quote on the System but would lock or cross the NBBO, the quote will be handled pursuant to Options 3, Section 4(b)(6).  When configured for cancel, Market Makers will have their quotes cancelled whenever the quote would lock or cross the NBBO or be placed on the book at a price other than its limit price.  This functionality shall not apply during an Opening Process.  

Adopted July 8, 2019 (SR-MRX-2019-15); amended September 17, 2019 (SR-MRX-2019-020), operative October 17, 2019; amended June 23, 2020 (SR-MRX-2020-13); amended March 12, 2021 (SR-MRX-2021-01), operative April 11, 2021; amended Sep. 9, 2022 (SR-MRX-2022-16), operative Nov. 7, 2022; amended Sep. 30, 2022 (SR-MRX-2022-18), operative Nov. 7, 2022; amended Jun. 6, 2023 (SR-MRX-2023-10), operative Oct. 17, 2023; amended Aug. 11, 2023 (SR-MRX-2023-14), operative Mar. 18, 2024; amended Feb. 6, 2025 (SR-MRX-2025-06), operative Mar. 8, 2025.

The following are Complex Order risk protections on MRX:

(a) Price limits for Complex Orders. As provided in Options 3, Section 14(d)(2), the legs of a complex strategy may be executed at prices that are inferior to the prices available on other exchanges trading the same options series. Notwithstanding, the System will not permit any leg of a complex strategy to trade through the NBBO for the series or any stock component by a configurable amount calculated as the lesser of (i) an absolute amount not to exceed $0.10, and (ii) a percentage of the NBBO not to exceed 500%, as determined by the Exchange on a class, series or underlying basis. A Member can also include an instruction on a Complex Order that each leg of the Complex Order is to be executed only at a price that is equal to or better than the NBBO on the opposite side for the options series or any stock component, as applicable (“Do-Not-Trade-Through” or “DNTT”).

(1) The System will reject orders for a complex strategy where all legs are to buy if entered at a price that is less than the minimum net price, which is calculated as the sum of the ratio on each leg of the complex strategy multiplied by the minimum increment applicable to that leg pursuant to Options 3, Section 14(c)(1).

(b) Strategy Protections. The following protections will apply throughout the trading day, including pre-market, during the Opening Process and during a trading halt. The protections will not apply to Complex Orders being auctioned and auction responses in the Facilitation Mechanism, Solicited Order Mechanism within Options 3, Section 11, and Price Improvement Mechanism within Options 3, Section 13 and will not apply to Customer Cross Orders pursuant to Options 3, Section 12.

(1) Vertical Spread Protection. The Vertical Spread Protection will apply to a vertical spread. A vertical spread is an order to buy a call (put) option and to sell another call (put) option in the same security with the same expiration but at a higher (lower) strike price).

(A) The System will reject a Vertical Spread order when entered with a net price of less than zero (minus a pre-set value), and will prevent the execution of a Vertical Spread order at a price that is less than zero (minus a pre-set value) when entered as a Market Order to sell. The Exchange will set a pre-set value not to exceed $1.00 to be applied uniformly across all classes. The Exchange may amend the pre-set value uniformly across all classes.

(B) The System will reject a Vertical Spread order when entered with a net price greater than the value of the higher strike price minus the lower strike price (plus a pre-set value), and will prevent the execution of a Vertical Spread order at a price that is greater than the value of the higher strike price minus the lower strike price (plus a pre-set value) when entered as a Market Order to buy. The pre-set value used by the vertical spread check will be the lesser of (1) an absolute amount not to exceed $1.00 and (2) a percentage of the difference between the strike prices not to exceed 10% to be applied uniformly across all classes. The Exchange may amend the pre-set value uniformly across all classes.

(2) Calendar Spread Protection. The Calendar Spread Protection will apply to a Calendar Spread. A calendar spread is an order to buy a call (put) option with a longer expiration and to sell another call (put) option with a shorter expiration in the same security at the same strike price.

(A) The System will reject a Calendar Spread order when entered with a net price of less than zero (minus a preset value), and will prevent the execution of a Calendar Spread order at a price that is less than zero (minus a pre-set value) when entered as a Market Complex Order to sell. The Exchange will set a pre-set value not to exceed $1.00 to be applied uniformly across all classes. The Exchange may amend the pre-set value uniformly across all classes.

(3) Butterfly Spread Protection. The Butterfly Spread Protection will apply to a butterfly spread. A butterfly spread is a three legged Complex Order with the following: (1) two legs to buy (sell) the same number of calls (puts); (2) one leg to sell (buy) twice the number of calls (puts) with a strike price at mid-point of the two legs to buy (sell); (3) all legs have the same expiration; and (4) each leg strike price is equidistant from the next sequential strike price.

(A) A Butterfly Spread Limit Order that is priced higher than the Maximum Value or lower than the Minimum Value will be rejected. A Butterfly Spread Market Order (or Butterfly Spread Limit Order entered with a net price inside the Butterfly Spread Protection Range) to buy (sell) will be restricted from executing by legging into the single leg market with a net price higher (lower) than the Maximum (Minimum) Value. The Butterfly Spread Protection Range is the absolute difference between the Minimum Value and the Maximum Value.

(i) The Initial Maximum Value is the distance between the strike price of the leg with the mid-point strike and either of the outer leg strike prices. The Maximum Value Buffer is the lesser of a configurable absolute dollar value or percentage of the Initial Maximum Value set by the Exchange and announced via a notice to Members. The Maximum Value is calculated by adding the Initial Maximum Value and Maximum Value Buffer.

(ii) The Initial Minimum Value is zero. The Minimum Value Buffer is a configurable absolute dollar value set by the Exchange and announced via a notice to Members. The Minimum Value is calculated by subtracting the Minimum Value Buffer from the Initial Minimum Value of zero.

(4) Box Spread Protection. The Box Spread Protection will apply to a box spread. A box spread is a four legged Complex Order with the following: (1) one pair of legs with the same strike price with one leg to buy a call (put) and one leg to sell a put (call); (2) a second pair of legs with a different strike price from the pair described in (1) with one leg to sell a call (put) and one leg to buy a put (call); (3) all legs have the same expiration; and (4) all legs have equal volume.

(A) A Box Spread Limit Order that is priced higher than the Maximum Value or lower than the Minimum Value will be rejected. A Box Spread Market Order (or Box Spread Limit Order entered with a net price inside the Box Spread Protection Range) to buy (sell) will be restricted from executing by legging into the single leg market with a net price higher (lower) than the Maximum (Minimum) Value. The Box Spread Protection Range is the absolute difference between the Minimum Value and the Maximum Value.

(i) The Initial Maximum Value is the distance between the strike prices of each pair of leg strike prices. The Maximum Value Buffer is the lesser of a configurable absolute dollar value or percentage of the Initial Maximum Value set by the Exchange and announced via a notice to Members. The Maximum Value is calculated by adding the Initial Maximum Value and Maximum Value Buffer.

(ii) The Initial Minimum Value is zero. The Minimum Value Buffer is a configurable absolute dollar value set by the Exchange and announced via a notice to Members. The Minimum Value is calculated by subtracting the Minimum Value Buffer from the Initial Minimum Value of zero.

(c) Other Price Protections which apply to Complex Orders.

(1) Complex Order Price Protection. There is a limit on the amount by which the net price of an incoming Limit Complex Order to buy may exceed the net price available from the individual options series on the Exchange and the national best bid or offer for any stock leg, and by which the net price of an incoming Limit Complex Order to sell may be below the net price available from the individual options series on the Exchange and the national best bid or offer for any stock leg. Limit Complex Orders that exceed the pricing limit are rejected. The limit is established by the Exchange from time-to-time for Limit Complex Orders to buy (sell) as the net price available from the individual options series on the Exchange and the national best bid or offer for any stock leg plus (minus) the greater of: (i) an absolute amount not to exceed $2.00, or (ii) a percentage of the net price available from the individual options series on the Exchange and the national best bid or offer for any stock leg not to exceed 10%.

(2) Size Limitation. There is a limit on the number of contracts (and shares in the case of a Stock-Option Strategy or Stock-Complex Strategy) any single leg of an incoming Complex Order may specify. Orders that exceed the maximum number of contracts (or shares) are rejected. The maximum number of contracts (or shares), which shall not be less than 10,000 (or 100,000 shares), is established by the Exchange from time-to-time.

(3) Price Level Protection. There is a limit on the number of price levels at which an incoming Complex Order to sell (buy) will be executed automatically with the bids or offers of each component leg when there are no bids (offers) from other exchanges at any price for the options series. Complex Orders are executed at each successive price level until the maximum number of price levels is reached on any component leg where the protection has been triggered, and any balance is canceled. The number of price levels for the component leg, which may be from one (1) to ten (10), is determined by the Exchange from time-to-time on a class-by-class basis.

(d) Stock-Tied NBBO. For Complex Orders in Stock-Option Strategies and Stock-Complex Strategies, the Exchange shall electronically communicate the underlying security component of a Complex Order to Nasdaq Execution Services, LLC (“NES”), its designated broker dealer, for immediate execution. Such execution and reporting will not occur on the Exchange and will be handled by NES pursuant to applicable rules regarding equity trading. NES will ensure that the execution price is within the high-low range for the day in that stock at the time the Complex Order is processed and within a certain price from the current market pursuant to Options 3, Section 16(a). If the stock price is not within these parameters, the Complex Order is not executable and the Exchange will hold the Complex Order on the Order Book, if consistent with Member instructions.

(e) Stock-Tied Reg SHO. When the short sale price test in Rule 201 of Regulation SHO is triggered for a covered security, NES will not execute a short sale order in the underlying covered security component of a Complex Order if the price is equal to or below the current national best bid. However, NES will execute a short sale order in the underlying covered security component of a Complex Order if such order is marked “short exempt,” regardless of whether it is at a price that is equal to or below the current national best bid. If NES cannot execute the underlying covered security component of a Complex Order in accordance with Rule 201 of Regulation SHO, the Exchange will hold the Complex Order on the Complex Order Book, if consistent with Member instructions. The order may execute at a price that is not equal to or below the current national best bid. For purposes of this paragraph, the term “covered security” shall have the same meaning as in Rule 201(a)(1) of Regulation SHO.

Adopted July 8, 2019 (SR-MRX-2019-15); amended Dec. 9, 2019 (SR-MRX-2019-25); amended Sep. 21, 2022 (SR-MRX-2022-10), operative Nov. 7, 2022; amended Jun. 6, 2023 (SR-MRX-2023-10), operative Oct. 17, 2023; amended Nov. 28, 2023 (SR-MRX-2023-22).

(a) Kill Switch enables Members to initiate a message to the System to promptly cancel and restrict their order activity on the Exchange, as described in section (a)(1) below. Members may submit a Kill Switch request to the System for certain identifier(s) ("Identifier") on a user level. The System will send an automated message to the Member when a Kill Switch request has been processed by the Exchange's System.

(1) A Member may submit a request to the System through FIX or OTTO to cancel all existing orders and restrict entry of additional orders for the requested Identifier(s) on a user level on the Exchange.

(2) Once a Member initiates the Kill Switch pursuant to section (a)(1) above, the Member will be unable to enter additional orders for the affected Identifier(s) until the Member has made a verbal request to the Exchange and Exchange staff has set a re-entry indicator to enable re-entry. Once enabled for re-entry, the System will send a Re-entry Notification Message to the Member. The applicable Clearing Member also will be notified of such re-entry into the System, provided the Clearing Member has requested to receive such notification.

Adopted July 8, 2019 (SR-MRX-2019-15); amended Oct. 15, 2019 (SR-MRX-2019-22); amended September 2, 2021 (SR-MRX-2021-10), operative November 1, 2021; amended September 30, 2022 (SR-MRX-2022-18), operative November 7, 2022; amended Jul. 24, 2024 (SR-MRX-2024-27), operative Aug. 23, 2024.

(a) Definitions

(1) A "Heartbeat" message is a communication which acts as a virtual pulse between the SQF, OTTO, or FIX Port and the Client Application. The Heartbeat message sent by the Member and subsequently received by the Exchange allows the SQF, OTTO, or FIX Port to continually monitor its connection with the Member.

(2) SQF Port is the Exchange's proprietary System component through which MRX Market Makers communicate their quotes from the Client Application.

(3) OTTO Port is the Exchange's proprietary System component through which Members communicate their orders from the Client Application.

(4) FIX Port is the Exchange's universal System component through which Members communicate their orders from the Client Application.

(5) Client Application is the System component of the Member through which the Exchange Member communicates its quotes and orders to the Exchange.

(6) Session of Connectivity shall mean each time the Member connects to the Exchange's System. Each new connection, intra-day or otherwise, is a new Session of Connectivity.

(b) When the SQF Port detects the loss of communication with a Member's Client Application because the Exchange's server does not receive a Heartbeat message for a certain time period ("nn" seconds), the Exchange will automatically logoff the Member's affected Client Application and automatically cancel all of the Member's open quotes pursuant to Section 18(e). Quotes will be cancelled across all Client Applications that are associated with the same MRX Market Maker ID and underlying issues.

(c) When the OTTO Port detects the loss of communication with a Member's Client Application because the Exchange's server does not receive a Heartbeat message for a certain time period ("nn" seconds), the Exchange will automatically logoff the Member's affected Client Application and if the Member has elected to have its orders cancelled pursuant to Section 18(f) automatically cancel all orders.

(d) When the FIX Port detects the loss of communication with a Member's Client Application because the Exchange's server does not receive a Heartbeat message for a certain time period ("nn" seconds), the Exchange will automatically logoff the Member's affected Client Application and if the Member has elected to have its orders cancelled pursuant to Section 18(g) automatically cancel all orders.

(e) The default time period ("nn" seconds) for SQF Ports shall be fifteen (15) seconds. A Member may determine another time period of "nn" seconds of no technical connectivity, as required in paragraph (b) above, to trigger the disconnect and must communicate that time to the Exchange. The period of "nn" seconds may be modified to a number between one hundred (100) milliseconds and 99,999 milliseconds for SQF Ports prior to each Session of Connectivity to the Exchange. This feature is enabled for each Member and may not be disabled.

(1) If the Member changes the default number of "nn" seconds, that new setting shall be in effect throughout the current Session of Connectivity and will then default back to fifteen seconds. The Member may change the default setting prior to each Session of Connectivity.

(2) If a time period is communicated to the Exchange by calling Exchange operations, the number of "nn" seconds selected by the Member shall persist for each subsequent Session of Connectivity until the Member either contacts Exchange operations by phone and changes the setting or the Member selects another time period through the Client Application prior to the next Session of Connectivity.

(f) The default period of "nn" seconds for OTTO Ports shall be fifteen (15) seconds for the disconnect and, if elected, the removal of orders. A Member may determine another time period of "nn" seconds of no technical connectivity, as required in paragraph (c) above, to trigger the disconnect and, if so elected, the removal of orders and communicate that time to the Exchange. The period of "nn" seconds may be modified to a number between one hundred (100) milliseconds and 99,999 milliseconds for OTTO Ports prior to each Session of Connectivity to the Exchange. This feature may be disabled for the removal of orders, however the Member will be disconnected.

(1) If the Member changes the default number of "nn" seconds, that new setting shall be in effect throughout the current Session of Connectivity and will then default back to fifteen seconds. The Member may change the default setting prior to each Session of Connectivity.

(2) If the time period is communicated to the Exchange by calling Exchange operations, the number of "nn" seconds selected by the Member shall persist for each subsequent Session of Connectivity until the Member either contacts Exchange operations by phone and changes the setting or the Member selects another time period through the Client Application prior to the next Session of Connectivity.

(g) The default period of "nn" seconds for FIX Ports shall be thirty (30) seconds for the disconnect and, if elected, the removal of orders. A Member may determine another time period of "nn" seconds of no technical connectivity, as required in paragraph (d) above, to trigger the disconnect and, if so elected, the removal of orders and communicate that time to the Exchange. The period of "nn" seconds may be modified to a number between one (1) second and thirty (30) seconds for FIX Ports prior to each Session of Connectivity to the Exchange. This feature may be disabled for the removal of orders, however the Member will be disconnected.

(1) If the Member changes the default number of "nn" seconds, that new setting shall be in effect throughout the current Session of Connectivity and will then default back to thirty seconds. The Member may change the default setting prior to each Session of Connectivity.

(2) If the time period is communicated to the Exchange by calling Exchange operations, the number of "nn" seconds selected by the Member shall persist for each subsequent Session of Connectivity until the Member either contacts Exchange operations by phone and changes the setting or the Member selects another time period through the Client Application prior to the next Session of Connectivity.

(h) The trigger for the SQF, OTTO, and FIX Ports is Client Application specific. The automatic cancellation of the MRX Market Maker's quotes for SQF Ports and open orders, if elected by the Member, for OTTO and FIX Ports entered into the respective SQF, OTTO, or FIX Ports via a particular Client Application will neither impact nor determine the treatment of the quotes of other MRX Market Makers entered into SQF Ports or orders of the same or other Members entered into OTTO or FIX Ports via a separate and distinct Client Application.

[Adopted July 8, 2019 (SR-MRX-2019-15).]

A Member may cancel any bids, offers, and orders in any series of options by requesting MRX Market Operations staff to effect such cancellation as per the instructions of the Member.

[Adopted July 8, 2019 (SR-MRX-2019-15); amended Dec. 9, 2019 (SR-MRX-2019-25.]

The Exchange may nullify a transaction or adjust the execution price of a transaction in accordance with this Rule. However, the determination as to whether a trade was executed at an erroneous price may be made by mutual agreement of the affected parties to a particular transaction. A trade may be nullified or adjusted on the terms that all parties to a particular transaction agree, provided, however, that such agreement to nullify or adjust must be conveyed to the Exchange in a manner prescribed by the Exchange prior to 8:30 a.m. Eastern Time on the first trading day following the execution. It is considered conduct inconsistent with just and equitable principles of trade for any Member to use the mutual adjustment process to circumvent any applicable Exchange Rule, the Act or any of the rules and regulations thereunder.

(a) Definitions.

(1) Customer. For purposes of this Rule, Customer has the same definition as Priority Customer in Options 1, Section 1(a)(36).

(2) Erroneous Sell/Buy Transaction. For purposes of this Rule, an "erroneous sell transaction" is one in which the price received by the person selling the option is erroneously low, and an "erroneous buy transaction" is one in which the price paid by the person purchasing the option is erroneously high.

(3) Official. For purposes of this Rule, an Official is an Officer of the Exchange or such other employee designee of the Exchange that is trained in the application of this Rule.

(4) Size Adjustment Modifier. For purposes of this Rule, the Size Adjustment Modifier will be applied to individual transactions as follows:

(b) Theoretical Price. Upon receipt of a request for review and prior to any review of a transaction execution price, the "Theoretical Price" for the option must be determined. For purposes of this Rule, if the applicable option series is traded on at least one other options exchange, then the Theoretical Price of an option series is the last NBB just prior to the trade in question with respect to an erroneous sell transaction or the last NBO just prior to the trade in question with respect to an erroneous buy transaction unless one of the exceptions in sub-paragraphs (b)(1) through (3) below exists. For purposes of this provision, when a single order received by the Exchange is executed at multiple price levels, the last NBB and last NBO just prior to the trade in question would be the last NBB and last NBO just prior to the Exchange's receipt of the order. The Exchange will rely on this paragraph (b) and Supplementary Material .06 of this Rule when determining Theoretical Price.

(1) Transactions at the Open. For a transaction occurring during the Opening Process (as defined in Options 3, Section 8) the Exchange will determine the Theoretical Price if there is no NBB or NBO for the affected series just prior to the erroneous transaction or if the bid/ask differential of the NBB and NBO just prior to the erroneous transaction is equal to or greater than the Minimum Amount set forth in the chart contained in sub-paragraph (b)(3) below. If the bid/ask differential is less than the Minimum Amount, the Theoretical Price is the NBB or NBO just prior to the erroneous transaction.

(2) No Valid Quotes. The Exchange will determine the Theoretical Price if there are no quotes or no valid quotes for comparison purposes. Quotes that are not valid are:

(A) all quotes in the applicable option series published at a time where the last NBB is higher than the last NBO in such series (a "crossed market");

(B) quotes published by the Exchange that were submitted by either party to the transaction in question;

(C) quotes published by another options exchange if either party to the transaction in question submitted the quotes in the series representing such options exchange's best bid or offer, provided that the Exchange will only consider quotes invalid on other options exchanges in up to twenty-five (25) total options series that the party identifies to the Exchange the quotes which were submitted by such party and published by other options exchanges; and

(D) quotes published by another options exchange against which the Exchange has declared self-help.

(3) Wide Quotes.

(A) The Exchange will determine the Theoretical Price if the bid/ask differential of the NBB and NBO for the affected series just prior to the erroneous transaction was equal to or greater than the Minimum Amount set forth below and there was a bid/ask differential less than the Minimum Amount during the 10 seconds prior to the transaction. If there was no bid/ask differential less than the Minimum Amount during the 10 seconds prior to the transaction then the Theoretical Price of an option series is the last NBB or NBO just prior to the transaction in question, as set forth in paragraph (b) above.

(B) Customer Transactions Occurring Within 10 Seconds or Less After an Opening or Re-Opening:

(i) The Exchange will determine the Theoretical Price if the bid/ask differential of the NBB and NBO for the affected series just prior to the Customer’s erroneous transaction was equal to or greater than the Minimum Amount set forth in paragraph (A) above and there was a bid/ask differential less than the Minimum Amount during the 10 seconds prior to the transaction.

(ii) If there was no bid/ask differential less than the Minimum Amount during the 10 seconds prior to the transaction, then the Exchange will determine the Theoretical Price if the bid/ask differential of the NBB and NBO for the affected series just prior to the Customer’s erroneous transaction was equal to or greater than the Minimum Amount set forth in paragraph (A) above and there was a bid/ask differential less than the Minimum Amount anytime during the 10 seconds after an opening or re-opening.

(iii) If there was no bid/ask differential less than the Minimum Amount during the 10 seconds following an Opening or Re-Opening, then the Theoretical Price of an option series is the last NBB or NBO just prior to the Customer transaction in question, as set forth in paragraph (b) above.

(iv) Customer transactions occurring more than 10 seconds after an opening or re-opening are subject to paragraph (A) above.

(c) Obvious Errors.

(1) Definition. For purposes of this Rule, an Obvious Error will be deemed to have occurred when the Exchange receives a properly submitted filing where the execution price of a transaction is higher or lower than the Theoretical Price for the series by an amount equal to at least the amount shown below:

(2) Time Deadline. A party that believes that it participated in a transaction that was the result of an Obvious Error must notify an Official in the manner specified from time to time by the Exchange in an Options Trader Alert distributed to Members. Such notification must be received by an Official within the timeframes specified below:

(A) Customer Orders. For an execution of a Customer order, a filing must be received by the Exchange within thirty (30) minutes of the execution, subject to sub-paragraph (C) below; and

(B) "Non-Customer" Orders. For an execution of any order other than a Customer order, a filing must be received by the Exchange within fifteen (15) minutes of the execution, subject to sub-paragraph (C) below.

(C) Linkage Trades. Any other options exchange will have a total of forty-five (45) minutes for Customer orders and thirty (30) minutes for non-Customer orders, measured from the time of execution on the Exchange, to file with the Exchange for review of transactions routed to the Exchange from that options exchange and executed on the Exchange ("linkage trades"). This includes filings on behalf of another options exchange filed by a third-party routing broker if such third-party broker identifies the affected transactions as linkage trades. In order to facilitate timely reviews of linkage trades the Exchange will accept filings from either the other options exchange or, if applicable, the third-party routing broker that routed the applicable order(s). The additional fifteen (15) minutes provided with respect to linkage trades shall only apply to the extent the options exchange that originally received and routed the order to the Exchange itself received a timely filing from the entering participant (i.e., within 30 minutes if a Customer order or 15 minutes if a non-Customer order).

(3) Official Acting on Own Motion. An Official may review a transaction believed to be erroneous on his/her own motion in the interest of maintaining a fair and orderly market and for the protection of investors. A transaction reviewed pursuant to this paragraph may be nullified or adjusted only if it is determined by the Official that the transaction is erroneous in accordance with the provisions of this Rule, provided that the time deadlines of sub-paragraph (c)(2) above shall not apply. The Official shall act as soon as possible after becoming aware of the transaction, and ordinarily would be expected to act on the same day that the transaction occurred. In no event shall the Official act later than 8:30 a.m. Eastern Time on the next trading day following the date of the transaction in question. A party affected by a determination to nullify or adjust a transaction pursuant to this provision may appeal such determination in accordance with paragraph (k) below; however, a determination by an Official not to review a transaction or determination not to nullify or adjust a transaction for which a review was conducted on an Official's own motion is not appealable. If a transaction is reviewed and a determination is rendered pursuant to another provision of this Rule, no additional relief may be granted under this provision.

(4) Adjust or Bust. If it is determined that an Obvious Error has occurred, the Exchange shall take one of the actions listed below. Upon taking final action, the Exchange shall promptly notify both parties to the trade electronically or via telephone.

(A) Non-Customer Transactions. Where neither party to the transaction is a Customer, the execution price of the transaction will be adjusted by the Official pursuant to the table below. Any non-Customer Obvious Error exceeding 50 contracts will be subject to the Size Adjustment Modifier defined in sub-paragraph (a)(4) above.

(B) Customer Transactions. Where at least one party to the Obvious Error is a Customer, the execution price of the transaction will be adjusted by the Official pursuant to the table immediately above. Any Customer Obvious Error exceeding 50 contracts will be subject to the Size Adjustment Modifier defined in sub-paragraph (a)(4) above. However, if such adjustment(s) would result in an execution price higher (for buy transactions) or lower (for sell transactions) than the Customer’s limit price, the trade will be nullified, subject to subparagraph (C) below.

(C) If any Member submits requests to the Exchange for review of transactions pursuant to this Rule, and in aggregate that Member has 200 or more Customer transactions under review concurrently and the orders resulting in such transactions were submitted during the course of 2 minutes or less, where at least one party to the Obvious Error is a non-Customer, the Exchange will apply the non-Customer adjustment criteria set forth in sub-paragraph (A) above to such transactions.

(d) Catastrophic Errors.

(1) Definition. For purposes of this Rule, a Catastrophic Error will be deemed to have occurred when the execution price of a transaction is higher or lower than the Theoretical Price for the series by an amount equal to at least the amount shown below:

(2) Time Deadline. A party that believes that it participated in a transaction that was the result of a Catastrophic Error must notify an Official in the manner specified from time to time by the Exchange in an Options Trader Alert distributed to Members. Such notification must be received by an Official by 8:30 a.m. Eastern Time on the first trading day following the execution. For transactions in an expiring options series that take place on an expiration day, a party must notify an Official within 45 minutes after the close of trading that same day.

(3) Adjust or Bust. If it is determined that a Catastrophic Error has occurred, the Exchange shall take action as set forth below. Upon taking final action, the Exchange shall promptly notify both parties to the trade electronically or via telephone. In the event of a Catastrophic Error, the execution price of the transaction will be adjusted by the Official pursuant to the table below. Any Customer order subject to this sub-paragraph will be nullified if the adjustment would result in an execution price higher (for buy transactions) or lower (for sell transactions) than the Customer's limit price.

(e) Significant Market Events.

(1) Definition. For purposes of this Rule, a Significant Market Event will be deemed to have occurred when: criterion (A) below is met or exceeded or the sum of all applicable event statistics, where each is expressed as a percentage of the relevant threshold in criteria (A) through (D) below, is greater than or equal to 150% and 75% or more of at least one category is reached, provided that no single category can contribute more than 100% to the sum and any category contributing more than 100% will be rounded down to 100%. All criteria set forth below will be measured in aggregate across all exchanges.

(A) Transactions that are potentially erroneous would result in a total Worst-Case Adjustment Penalty of $30,000,000, where the Worst-Case Adjustment Penalty is computed as the sum, across all potentially erroneous trades, of:

(i) $0.30 (i.e., the largest Transaction Adjustment value listed in sub-paragraph (e)(3)(A) below); times

(ii) the contract multiplier for each traded contract; times

(iii) the number of contracts for each trade; times

(iv) the appropriate Size Adjustment Modifier for each trade, if any, as defined in sub-paragraph (e)(3)(A) below.

(B) Transactions involving 500,000 options contracts are potentially erroneous;

(C) Transactions with a notional value (i.e., number of contracts traded multiplied by the option premium multiplied by the contract multiplier) of $100,000,000 are potentially erroneous;

(D) 10,000 transactions are potentially erroneous.

(2) Coordination with Other Options Exchanges. To ensure consistent application across options exchanges, in the event of a suspected Significant Market Event, the Exchange shall initiate a coordinated review of potentially erroneous transactions with all other affected options exchanges to determine the full scope of the event. When this paragraph is invoked, the Exchange will promptly coordinate with the other options exchanges to determine the appropriate review period as well as select one or more specific points in time prior to the transactions in question and use one or more specific points in time to determine Theoretical Price. Other than the selected points in time, if applicable, the Exchange will determine Theoretical Price in accordance with paragraph (b) above.

(3) Adjust or Bust. If it is determined that a Significant Market Event has occurred then, using the parameters agreed as set forth in sub-paragraph (e)(2) above, if applicable, an Official will determine whether any or all transactions under review qualify as Obvious Errors. The Exchange shall take one of the actions listed below with respect to all transactions that qualify as Obvious Errors pursuant to sub-paragraph (c)(1) above. Upon taking final action, the Exchange shall promptly notify both parties to the trade electronically or via telephone.

(A) The execution price of each affected transaction will be adjusted by an Official to the price provided below unless both parties agree to adjust the transaction to a different price or agree to bust the trade. In the context of a Significant Market Event, any error exceeding 50 contracts will be subject to the Size Adjustment Modifier defined in subparagraph (a)(4) above.

(B) Where at least one party to the transaction is a Customer, the trade will be nullified if the adjustment would result in an execution price higher (for buy transactions) or lower (for sell transactions) than the Customer's limit price.

(4) Nullification of Transactions. If the Exchange, in consultation with other options exchanges, determines that timely adjustment is not feasible due to the extraordinary nature of the situation, then the Exchange will nullify some or all transactions arising out of the Significant Market Event during the review period selected by the Exchange and other options exchanges consistent with this paragraph. To the extent the Exchange, in consultation with other options exchanges, determines to nullify less than all transactions arising out of the Significant Market Event, those transactions subject to nullification will be selected based upon objective criteria with a view toward maintaining a fair and orderly market and the protection of investors and the public interest.

(5) Final Rulings. With respect to rulings made pursuant to this paragraph, the number of affected transactions is such that immediate finality is necessary to maintain a fair and orderly market and to protect investors and the public interest. Accordingly, rulings by the Exchange pursuant to this paragraph are non-appealable.

(f) Trading Halts. The Exchange shall nullify any transaction that occurs during a trading halt in the affected option on the Exchange pursuant to Options 3, Section 9.

(g) Erroneous Print in Underlying. A trade resulting from an erroneous print(s) disseminated by the underlying market that is later nullified by that underlying market shall be adjusted or busted as set forth in sub-paragraph (c)(4) of this Rule, provided a party notifies an Official in a timely manner as set forth below. For purposes of this paragraph, a trade resulting from an erroneous print(s) shall mean any options trade executed during a period of time for which one or more executions in the underlying security are nullified and for one second thereafter. If a party believes that it participated in an erroneous transaction resulting from an erroneous print(s) pursuant to this paragraph it must notify an Official within the timeframes set forth in sub-paragraph (c)(2) above, with the allowed notification timeframe commencing at the time of notification by the underlying market(s) of nullification of transactions in the underlying security. If multiple underlying markets nullify trades in the underlying security, the allowed notification timeframe will commence at the time of the first market's notification.

(h) Erroneous Quote in Underlying. A trade resulting from an erroneous quote(s) in the underlying security shall be adjusted or busted as set forth in subparagraph (c)(4) this Rule, provided a party notifies an Official in a timely manner as set forth below. An erroneous quote occurs when the underlying security has a width of at least $1.00 and has a width at least five times greater than the average quote width for such underlying security during the time period encompassing two minutes before and after the dissemination of such quote. For purposes of this paragraph, the average quote width shall be determined by adding the quote widths of sample quotations at regular 15-second intervals during the four-minute time period referenced above (excluding the quote(s) in question) and dividing by the number of quotes during such time period (excluding the quote(s) in question). If a party believes that it participated in an erroneous transaction resulting from an erroneous quote(s) pursuant to this paragraph it must notify an Official in accordance with sub-paragraph (c)(2) above.

(i) Stop (and Stop-Limit) Order Trades Triggered by Erroneous Trades. Transactions resulting from the triggering of a stop or stop-limit order by an erroneous trade in an option contract shall be nullified by the Exchange, provided a party notifies an Official in a timely manner as set forth below. If a party believes that it participated in an erroneous transaction pursuant to this paragraph it must notify an Official within the timeframes set forth in sub-paragraph (c)(2) above, with the allowed notification timeframe commencing at the time of notification of the nullification of transaction(s) that triggered the stop or stop-limit order.

(j) Linkage Trades. If the Exchange routes an order pursuant to the Plan (as defined in Options 5, Section 1(n)) that results in a transaction on another options exchange (a "Linkage Trade") and such options exchange subsequently nullifies or adjusts the Linkage Trade pursuant to its Rules, the Exchange will perform all actions necessary to complete the nullification or adjustment of the Linkage Trade.

(k) Appeals. If a Member affected by a determination made under this Rule so requests within the time permitted below, an Exchange Review Council panel will review decisions made by the Official under this Rule, including whether an obvious error occurred and whether the correct determination was made.

(1) An Exchange Review Council panel will be comprised minimally of representatives of one (1) Member engaged in market making and two (2) industry representatives not engaged in market making. At no time should a review panel have more than 50% Members engaged in market making.

(2) A request for review on appeal must be made in writing via e-mail or other electronic means specified from time to time by the Exchange in an Options Trader Alert distributed to Members within thirty (30) minutes after the party making the appeal is given notification of the initial determination being appealed, except that if such notification is made after 3:30 p.m. Eastern Time, either party has until 9:30 a.m. Eastern Time on the next trading day to request a review. The Exchange Review Council panel shall review the facts and render a decision on the day of the transaction, or the next trade day in the case where a request is properly made after 3:30 p.m. on the day of the transaction or where the request is properly made the next trade day.

(3) The Exchange Review Council panel may overturn or modify an action taken by the Official under this Rule. All determinations by the Exchange Review Council panel shall constitute final action by the Exchange on the matter at issue.

(4) If the Exchange Review Council panel votes to uphold the decision made pursuant to paragraph (k) above, the Exchange will assess a $500.00 fee against the Member(s) who initiated the request for appeal. In addition, in instances where the Exchange, on behalf of a Member, requests a determination by another market center that a transaction is clearly erroneous, the Exchange will pass any resulting charges through to the relevant Member.

(5) Any determination by an Official or by the Exchange Review Council panel shall be rendered without prejudice as to the rights of the parties to the transaction to submit their dispute to arbitration.

(l) Erroneous Trades due to System Disruptions and Malfunctions

(1) Verifiable Disruptions or Malfunctions of Exchange Systems.

(A) Transactions arising out of a "verifiable disruption or malfunction" in the use or operation of any Exchange automated quotation, dissemination, execution, or communication system may either be nullified or adjusted by an Official. Transactions that qualify for price adjustment will be adjusted in accordance with the guidelines contained in Options 3, Section 20(b)(2)(i)(A) and (B).

(B) Absent extraordinary circumstances, any such action by an Official pursuant to this Rule shall be initiated within sixty (60) minutes of the occurrence of the erroneous transaction that resulted from a verifiable disruption or malfunction. Each Member involved in the transaction shall be notified as soon as practicable.

(C) Any Member aggrieved by the action of an Official taken pursuant to paragraph (A) above may appeal such action in accordance with the provisions of subsection (2).

(2) Procedures for Review of Decisions Made Pursuant to Options 3, Section 20(l)(1).

(A) If a party to a ruling by an Official made pursuant to subsection (1) of this Rule requests within the time permitted below, an Exchange Review Council panel will be utilized to review decisions made by the Official under this Rule.

(i) An Exchange Review Council panel will be comprised minimally of representatives of one (1) Member engaged in market making and two (2) industry representatives not engaged in market making. At no time should a review panel have more than 50% Members engaged in market making.

(ii) (ii) A request for review on appeal must be made via facsimile or e-mail within thirty (30) minutes after the party making the appeal is given notification of the initial determination being appealed. The Exchange Review Council panel shall review the facts and render a decision within the time frame prescribed by the Exchange.

(iii) (iii) The Exchange Review Council panel may overturn or modify an action taken by the Exchange under this Rule. All determinations by the Exchange Review Council panel shall constitute final action by the Exchange on the matter at issue.

Supplementary Material to Options 3, Section 20

.01 Limit Up-Limit Down State. An execution will not be subject to review as an Obvious Error or Catastrophic Error pursuant to paragraph (c) or (d) of this Rule if it occurred while the underlying security was in a "Limit State" or "Straddle State," as defined in the Plan to Address Extraordinary Market Volatility Pursuant to Rule 608 of Regulation NMS under the Act (the "Limit Up-Limit Down Plan"). Nothing in this provision shall prevent such execution from being reviewed on an Official's own motion pursuant to sub-paragraph (c)(3) of this Rule, or a bust or adjust pursuant to paragraphs (e) through (j) of this Rule.

.02 For the purposes of this Rule, to the extent the provisions of this Rule would result in the Exchange applying an adjustment of an erroneous sell transaction to a price lower than the execution price or an erroneous buy transaction to a price higher than the execution price, the Exchange will not adjust or nullify the transaction, but rather, the execution price will stand.

.03 When an Official determines that an Error has occurred and action is warranted under paragraphs (c) or (d) above, the identity of the parties to the trade will be disclosed to each other in order to encourage conflict resolution.

.04 Complex Order Executions. If both parties to a trade that is one component of a Complex Order Execution are parties to all of the trades that together comprise the execution of a Complex Order at a single net debit or credit, then if one of those component trades can be nullified under this Rule, all component trades that were part of the same Complex Order shall be nullified as well.

.05 Complex Orders and Stock-Option Orders.

(a) If a Complex Order executes against individual legs and at least one of the legs qualifies as an Obvious Error under paragraph (c)(1) or a Catastrophic Error under paragraph (d)(1), then the leg(s) that is an Obvious or Catastrophic Error will be adjusted in accordance with paragraphs (c)(4)(A) or (d)(3), respectively, regardless of whether one of the parties is a Customer. However, any Customer order subject to this paragraph (a) will be nullified if the adjustment would result in an execution price higher (for buy transactions) or lower (for sell transactions) than the Customer's limit price on the Complex Order or individual leg(s). If any leg of a Complex Order is nullified, the entire transaction is nullified.

(b) If a Complex Order executes against another Complex Order and at least one of the legs qualifies as an Obvious Error under paragraph (c)(1) or a Catastrophic Error under paragraph (d)(1), then the leg(s) that is an Obvious or Catastrophic Error will be adjusted or busted in accordance with paragraph (c)(4) or (d)(3), respectively, so long as either: (i) the width of the National Spread Market for the complex strategy just prior to the erroneous transaction was equal to or greater than the amount set forth in the wide quote table of paragraph (b)(3) or (ii) the net execution price of the Complex Order is higher (lower) than the offer (bid) of the National Spread Market for the complex strategy just prior to the erroneous transaction by an amount equal to at least the amount shown in the table in paragraph (c)(1). If any leg of a Complex Order is nullified, the entire transaction is nullified. For purposes of Options 3, Section 20, the National Spread Market for a complex strategy is determined by the National Best Bid/Offer of the individual legs of the strategy.

(c) If the option leg of a stock-option order qualifies as an Obvious Error under paragraph (c)(1) or a Catastrophic Error under paragraph (d)(1), then the option leg that is an Obvious or Catastrophic Error will be adjusted in accordance with paragraph (c)(4)(A) or (d)(3), respectively, regardless of whether one of the parties is a Customer. However, the option leg of any Customer order subject to this paragraph (c) will be nullified if the adjustment would result in an execution price higher (for buy transactions) or lower (for sell transactions) than the Customer's limit price on the stock-option order, and the Exchange will attempt to nullify the stock leg. Whenever a stock trading venue nullifies the stock leg of a stock option order or whenever the stock leg cannot be executed, the Exchange will nullify the option leg upon request of one of the parties to the transaction or in accordance with paragraph (c)(3).

.06 Exchange Determining Theoretical Price. For purposes of this Rule, when the Exchange must determine Theoretical Price pursuant to sub-paragraphs (b)(1)-(3) of this Rule (i.e., at the open, when there are no valid quotes or when there is a wide quote), then the Exchange will determine Theoretical Price as follows.

(a) The Exchange will request Theoretical Price from the third party vendor defined in paragraph (d) below ("TP Provider") to which the Exchange and all other options exchanges have subscribed. The Exchange will apply the Theoretical Price provided by the TP Provider, except as otherwise described below.

(b) To the extent an Official of the Exchange believes that the Theoretical Price provided by the TP Provider is fundamentally incorrect and cannot be used consistent with the maintenance of a fair and orderly market, the Official shall contact the TP Provider to notify the TP Provider of the reason the Official believes such Theoretical Price is inaccurate and to request a review and correction of the calculated Theoretical Price. The Exchange shall also promptly provide electronic notice to other options exchanges that the TP Provider has been contacted consistent with this paragraph and include a brief explanation of the reason for the request.

(c) An Official of the Exchange may determine the Theoretical Price if the TP Provider has experienced a systems issue that has rendered its services unavailable to accurately calculate Theoretical Price and such issue cannot be corrected in a timely manner.

(d) The current TP Provider to which the Exchange and all other options exchanges have subscribed is: CBOE Livevol, LLC. Neither the Exchange, the TP Provider, nor any affiliate of the TP Provider (the TP Provider and its affiliates are referred to collectively as the "TP Provider"), makes any warranty, express or implied, as to the results to be obtained by any person or entity from the use of the TP Provider pursuant to this Supplementary Material .06. The TP Provider does not guarantee the accuracy or completeness of the calculated Theoretical Price. The TP Provider disclaims all warranties of merchantability or fitness for a particular purpose or use with respect to such Theoretical Price. Neither the Exchange nor the TP Provider shall have any liability for any damages, claims, losses (including any indirect or consequential losses), expenses, or delays, whether direct or indirect, foreseen or unforeseen, suffered by any person arising out of any circumstance or occurrence relating to the use of such Theoretical Price or arising out of any errors or delays in calculating such Theoretical Price.

Adopted July 8, 2019 (SR-MRX-2019-15); amended October 18, 2019 (SR-MRX-2019-23); amended Dec. 9, 2019 (SR-MRX-2019-25; amended Mar. 8, 2022 (SR-MRX-2022-03), operative Apr. 7, 2022; amended Jan. 26, 2022 (SR-MRX-2022-02), operative Jul. 1, 2022.

(a) Access to Exchange. Unless otherwise provided in the Rules, no one but a Member or a person associated with a Member shall effect any Exchange Transactions. The Exchange may share any Member-designated risk settings in the System with the Clearing Member that clears transactions on behalf of the Member.

(b) Exchange Conduct. Members and persons employed by or associated with any Member, while using the facilities of the Exchange, shall not engage in conduct (i) inconsistent with the maintenance of a fair and orderly market; (ii) apt to impair public confidence in the operations of the Exchange; or (iii) inconsistent with the ordinary and efficient conduct of business. Activities that may violate the provisions of this paragraph (b) include, but are not limited to, the following:

(1) failure of a Market Maker to provide quotations in accordance with Options 2, Section 5;

(2) failure of a Market Maker to bid or offer within the ranges specified by Options 2, Section 4;

(3) failure of a Member to supervise a person employed by or associated with such Member adequately to ensure that person's compliance with this paragraph (b);

(4) failure to abide by a determination of the Exchange;

(5) refusal to provide information requested by the Exchange; and

(6) failure to abide by the provisions of Options 3, Section 22.

Supplementary Material to Options 3, Section 21

.01

(a) General. The Exchange shall be available for entry and execution of orders by Sponsored Customers with authorized access. Sponsored Access shall mean an arrangement whereby a Member permits its customers to enter orders into the System that bypass the Member's trading system and are routed directly to the Exchange, including routing through a service bureau or other third party technology provider.

(b) Sponsored Customers. A Sponsored Customer may obtain authorized access to the Exchange only if such access is authorized in advance by one or more Sponsoring Members as follows:

(1) Sponsored Customers must enter into and maintain customer agreements with one or more Sponsoring Members establishing proper relationship(s) and account(s) through which the Sponsored Customers may trade on the Exchange ("Customer Agreement"). Such Customer Agreement(s) must incorporate the sponsorship provisions set forth in paragraph (2) below.

(2) For a Sponsored Customer to obtain and maintain authorized access to the Exchange, a Sponsored Customer and its Sponsoring Member must agree in writing to the following sponsorship provisions:

(i) The authorized access must comply with Rule 15c3-5 under the Securities Exchange Act of 1934.

(ii) Sponsoring Member acknowledges and agrees that

(A) All orders entered by the Sponsored Customer and any person acting on behalf of or in the name of such Sponsored Customer and any executions occurring as a result of such orders are binding in all respects on the Sponsoring Member, and

(B) Sponsoring Member is responsible for any and all actions taken by such Sponsored Customer and any person acting on behalf of or in the name of such Sponsored Customer.

(iii) Sponsoring Member shall comply with the Exchange's Certificate of Formation, By-Laws, Rules and procedures with regard to the Exchange and Sponsored Customer shall comply with Exchange's Certificate of Formation, By-Laws, Rules and procedures with regard to the Exchange, as if Sponsored Customer were an Exchange Member.

(iv) Sponsored Customer shall maintain, keep current and provide to the Sponsoring Member a list of persons who have been granted access to the Exchange on behalf of the Sponsored Customer ("Authorized Traders").

(v) Sponsored Customer shall familiarize its Authorized Traders with all of the Sponsored Customer's obligations under this Rule and will assure that they receive appropriate training prior to any use or access to the Exchange.

(vi) Sponsored Customer may not permit anyone other than Authorized Traders to use or obtain access to the Exchange.

(vii) Sponsored Customer shall take reasonable security precautions to prevent unauthorized use or access to the Exchange, including unauthorized entry of information into the Exchange's System, or the information and data made available therein. Sponsored Customer understands and agrees that Sponsored Customer is responsible for any and all orders, trades and other messages and instructions entered, transmitted or received under identifiers, passwords and security codes of Authorized Traders, and for the trading and other consequences thereof.

(viii) Sponsored Customer acknowledges its responsibility to establish adequate procedures and controls that permit it to effectively monitor its employees, agents and customers' use and access to the Exchange for compliance with this Rule.

(ix) Sponsored Customer shall pay when due all amounts, if any, payable to Sponsoring Member, the Exchange or any other third parties that arise from the Sponsored Customer's access to and use of the Exchange. Such amounts include, but are not limited to applicable exchange and regulatory fees.

[Adopted July 8, 2019 (SR-MRX-2019-15).]

(a) Limit Orders. Electronic Access Members shall not enter Priority Customer limit orders into the System in the same options series, for the account or accounts of the same or related beneficial owners, in such a manner that the beneficial owner(s) effectively is operating as a Market Maker by holding itself out as willing to buy and sell such options contract on a regular or continuous basis. In determining whether a beneficial owner effectively is operating as a Market Maker, the Exchange will consider, among other things: the simultaneous or near-simultaneous entry of limit orders to buy and sell the same options contract and the entry of multiple limit orders at different prices in the same options series.

(b) Limitations on Principal Transactions. Electronic Access Members may not execute as principal orders they represent as agent unless (i) agency orders are first exposed on the Exchange for at least one (1) second, (ii) the Electronic Access Member has been bidding or offering on the Exchange for at least one (1) second prior to receiving an agency order that is executable against such bid or offer, or (iii) the Member utilizes the Facilitation Mechanism pursuant to Options 3, Section 11(b) and (c); (iv) the Member utilizes the Price Improvement Mechanism for Crossing Transactions pursuant to Options 3, Section 13; (v) the Member utilizes Qualified Contingent Cross Orders pursuant to Options 3, Section 12(c) and (d); (vi) the Member utilizes a Customer Cross Order pursuant to Options 3, Sections 12(a) or (b); or (vii) the Member utilizes a Complex Order Exposure pursuant to Supplementary Material .01 to Options 3, Section 14. Electronic Access Members may not execute as principal orders they represent as agent within the Solicitation Mechanism pursuant to Options 3, Section 11(d) and (e).

(1) This Rule prevents an Electronic Access Member from executing agency orders to increase its economic gain from trading against the order without first giving other trading interest on the Exchange an opportunity to either trade with the agency order or to trade at the execution price when the Member was already bidding or offering on the book. However, the Exchange recognizes that it may be possible for an Electronic Access Member to establish a relationship with a customer or other person (including affiliates) to deny agency orders the opportunity to interact on the Exchange and to realize similar economic benefits as it would achieve by executing agency orders as principal. It will be a violation of this Rule for an Electronic Access Member to be a party to any arrangement designed to circumvent this Rule by providing an opportunity for a customer or other person (including affiliates) to regularly execute against agency orders handled by the Electronic Access Member immediately upon their entry into the System.

(c) Limitation on Solicitation Orders. Electronic Access Members may not execute orders they represent as agent on the Exchange against orders solicited from Members and non-Member broker-dealers to transact with such orders unless (i) the unsolicited order is first exposed on the Exchange for at least one (1) second, (ii) the Member utilizes the Solicited Order Mechanism pursuant to Options 3, Section 11(d) and (e), (iii) the Member utilizes the Facilitation Mechanism pursuant to Options 3, Section 11(b) and (c); (iv) the Member utilizes the Price Improvement Mechanism for Crossing Transactions pursuant to Options 3, Section 13; (v) the Member utilizes Qualified Contingent Cross Orders pursuant to Options 3, Section 12(c) and (d); (vi) the Member utilizes a Customer Cross Order pursuant to Options 3, Sections 12(a) or (b); or (vii) the Member utilizes a Complex Order Exposure pursuant to Supplementary Material .01 to Options 3, Section 14.

(d) Prior to or after submitting an order to MRX, a Member cannot inform another Member or any other third party of any of the terms of the order for purposes of violating this Rule.

(e) Orders for the Account of Another Member. Electronic Access Members shall not cause the entry of orders for the account of an Exchange Market Maker that is exempt from the provisions of Regulation T of the Board of Governors of the Federal Reserve System pursuant to Section 7(c)(2) of the Exchange Act unless such orders are identified as orders for the account of an Exchange Market Maker in the manner prescribed by the Exchange.

Supplementary Material to Options 3, Section 22

.01 Options 3, Section 22(b) prevents an Electronic Access Member from executing agency orders to increase its economic gain from trading against the order without first giving other trading interest on the Exchange an opportunity to either trade with the agency order or to trade at the execution price when the Member was already bidding or offering on the book. However, the Exchange recognizes that it may be possible for an Electronic Access Member to establish a relationship with a customer or other person (including affiliates) to deny agency orders the opportunity to interact on the Exchange and to realize similar economic benefits as it would achieve by executing agency orders as principal. It will be a violation of Options 3, Section 22(b) for an Electronic Access Member to be a party to any arrangement designed to circumvent Options 3, Section 22(b) by providing an opportunity for a customer or other person (including affiliates) to regularly execute against agency orders handled by the Electronic Access Member immediately upon their entry into the System.

.02 With respect to the non-displayed reserve portion of a Reserve Order, the exposure requirement of paragraphs (b) and (c) are satisfied if the displayable portion of the Reserve Order is displayed at its displayable price for one second.

.03 The exposure requirement of paragraph (b) applies to the entry of orders with knowledge that there is a pre-existing unexecuted agency, proprietary, or solicited order on the Exchange. Members may demonstrate that orders were entered without knowledge by providing evidence that effective information barriers between the persons, business units and/or systems entering the orders onto the Exchange were in existence at the time the orders were entered. Such information barriers must be fully documented and provided to the Exchange upon request.

Adopted July 8, 2019 (SR-MRX-2019-15); amended September 17, 2019 (SR-MRX-2019-020), operative October 17, 2019; amended Feb. 6, 2025 (SR-MRX-2025-06), operative Mar. 8, 2025.

(a) The following data feeds contain MRX trading information offered by MRX:

(1) Nasdaq MRX Depth of Market Data Feed ("Depth of Market Feed") is a data feed that provides full order and quote depth information for individual orders and quotes on the Exchange book and last sale information for trades executed on the Exchange. The data provided for each option series includes the symbols (series and underlying security), put or call indicator, expiration date, the strike price of the series, and whether the option series is available for trading on the Exchange and identifies if the series is available for closing transactions only. The feed also provides order imbalances on opening/reopening (size of matched contracts and size of the imbalance).

(2) Nasdaq MRX Order Feed ("Order Feed") provides information on new orders resting on the book (e.g. price, quantity, market participant capacity and Attributable Order tags when provided by a Member). The data provided for each option series includes the symbols (series and underlying security), displayed order types, order attributes (e.g., OCC account number, give-up information, CMTA information), put or call indicator, expiration date, the strike price of the series, and whether the option series is available for trading on MRX and identifies if the series is available for closing transactions only. The feed also provides order imbalances on opening/reopening (size of matched contracts and size of the imbalance), auction and exposure notifications.

(3) Nasdaq MRX Top of Market Feed ("Top Feed") calculates and disseminates MRX's best bid and offer position, with aggregated size (including total size in aggregate, for Professional Order size in the aggregate and Priority Customer Order size in the aggregate), based on displayable order and quote interest in the System. The feed also provides last trade information and for each option series includes the symbols (series and underlying security), put or call indicator, expiration date, the strike price of the series, and whether the option series is available for trading on MRX and identifies if the series is available for closing transactions only. The feed also provides order imbalances on opening/reopening.

(4) Nasdaq MRX Trades Feed ("Trades Feed") displays last trade information. The data provided for each option series includes the symbols (series and underlying security), put or call indicator, expiration date, the strike price of the series, and whether the option series is available for trading on MRX and identifies if the series is available for closing transactions only.

(5) Nasdaq MRX Spread Feed ("Spread Feed") is a feed that consists of: (1) options orders for all Complex Orders (i.e., spreads, buy-writes, delta neutral strategies, etc.); (2) full Complex Order depth information, including prices, side, size, capacity, Attributable Complex Order tags when provided by a Member, and order attributes (e.g., OCC account number, give-up information, CMTA information), for individual Complex Orders on the Exchange book; (3) last trades information; and (4) calculating and disseminating MRX's complex best bid and offer position, with aggregated size (including total size in aggregate, for Professional Order size in the aggregate and Priority Customer Order size in the aggregate), based on displayable Complex Order interest in the System. The feed also provides Complex Order auction notifications.

(b) The following order and execution information is available to Members:

(1) Clearing Trade Interface ("CTI") is a real-time cleared trade update message that is sent to a Member after an execution has occurred and contains trade details specific to that Member. The information includes, among other things, the following: (i) The Clearing Member Trade Agreement ("CMTA") or The Options Clearing Corporation ("OCC") number; (ii) badge or mnemonic; (iii) account number; (iv) information which identifies the transaction type (e.g. auction type) for billing purposes; and (v) market participant capacity.

(2) Reserved.

(3) FIX DROP is a real-time order and execution update message that is sent to a Member after an order has been received/modified or an execution has occurred and contains trade details specific to that Member. The information includes, among other things, the following: (i) executions; (ii) cancellations; (iii) modifications to an existing order; and (iv) busts or post-trade corrections.

(c) The following trade information is available on an End of Day, Intra-Day, and historical basis:

(1) MRX Options Trade Outline provides aggregate quantity and volume information for trades on the Exchange for all series during a trading session. Information is provided in the following categories: (i) total exchange volume for Intra-Day information and total exchange and industry volume for End of Day information for each reported series; (ii) open interest for the series; (iii) aggregate quantity of trades and aggregate trade volume effected to open a position, characterized by origin type (Priority Customers, Broker-Dealers, Market Makers, Firm Proprietary, and Professional Customers); and (iv) aggregate quantity of trades and aggregate trade volume effected to close a position, characterized by origin type (Priority Customers, Broker-Dealers, Market Makers, Firm Proprietary, and Professional Customers).

MRX Trade Outline End of Day will also provide opening buy, closing buy, opening sell and closing sell information, which shall include option first trade price, option high trade price, option low trade price, and option last trade price.

End of Day information will be available the next business day. Intra-Day information is updated at 10-minute intervals over the course of the trading day. Historical information will be available upon request.

Adopted July 8, 2019 (SR-MRX-2019-15); amended September 30, 2022 (SR-MRX-2022-18), operative November 7, 2022; amended Aug. 9, 2024 (SR-MRX-2024-31), operative Sep. 2, 2024; amended Feb. 6, 2025 (SR-MRX-2025-06), operative Mar. 8, 2025.

The price at which an order is executed shall be binding notwithstanding that an erroneous report in respect thereto may have been rendered, or no report rendered. A report shall not be binding if an order was not actually executed but was reported to have been executed in error.

[Adopted July 8, 2019 (SR-MRX-2019-15).]

[Adopted July 8, 2019 (SR-MRX-2019-15).]

In order to control the number of quotations the Exchange disseminates, the Exchange shall disseminate an updated bid and offer price, together with the size associated with such bid and offer, when: (1) the Exchange's disseminated bid or offer price increases or decreases; (2) the size associated with the Exchange's disseminated bid or offer decreases; or (3) the size associated with the Exchange's bid (offer) increases by an amount greater than or equal to a percentage (never to exceed 20%) of the size associated with previously disseminated bid (offer). Such percentage, which shall never exceed 20%, shall be determined on an issue-by-issue basis by the Exchange and announced to membership via an Options Trader Alert.

[Adopted July 8, 2019 (SR-MRX-2019-15).]

(a) The Exchange, its Directors, officers, committee members, employees, contractors or agents shall not be liable to Members nor any persons associated with Members for any loss, expense, damages or claims arising out of the use of the facilities, systems or equipment afforded by the Exchange, nor any interruption in or failure or unavailability of any such facilities, systems or equipment, whether or not such loss, expense, damages or claims result or are alleged to result from negligence or other unintentional errors or omissions on the part of the Exchange, its Directors, officers, committee members, employees, contractors, agents or other persons acting on its behalf, or from systems failure, or from any other cause within or outside the control of the Exchange. Without limiting the generality of the foregoing, the Exchange shall have no liability to any person for any loss, expense, damages or claims which result from any error, omission or delay in calculating or disseminating any current or closing index value or any reports of transactions in or quotations for options or other securities, including underlying securities.

(b) The Exchange makes no warranty, express or implied, as to results to be obtained by any person or entity from the use of any data transmitted or disseminated by or on behalf of the Exchange or any reporting authority designated by the Exchange, including but not limited to, reports of transactions in or quotations for securities traded on the Exchange or underlying securities, or reports of interest rate measures or index values or related data, and the Exchange makes no express or implied warranties of merchantability or fitness for a particular purpose or use with respect to any such data.

(c) No Member or person associated with a Member shall institute a lawsuit or other legal proceeding against the Exchange or any Director, officer, employee, contractor, agent or other official of the Exchange or any subsidiary of the Exchange, for actions taken or omitted to be taken in connection with the official business of the Exchange or any subsidiary, except to the extent such actions or omissions constitution violations of the federal securities laws for which a private right of action exists. This provision shall not apply to appeals of disciplinary actions or other actions by the Exchange as provided for in the Rules.

(d) Notwithstanding paragraph (a) above, the Exchange, subject to the express limits set forth below, may compensate users of the Exchange for losses directly resulting from the actual failure of the System, or any other Exchange quotation, transaction reporting, execution, order routing or other systems or facility to correctly process an order, quote, message, or other data, provided that the Exchange has acknowledged receipt of the order, quote, message, or data.

(1) For the aggregate of all claims made by all market participants related to the use of the Exchange during a single calendar month, the Exchange's payments shall not exceed the larger of $500,000, or the amount of the recovery obtained by the Exchange under any applicable insurance policy.

(2) In the event that all of the claims arising out of the use of the Exchange cannot be fully satisfied because in the aggregate they exceed the limitations provided for in this Rule, then the maximum permitted amount will be proportionally allocated among all such claims arising during a single calendar month.

(3) All claims for compensation pursuant to this Rule shall be in writing and must be submitted no later than 12:00 P.M. ET on the next business day following the day on which the use of the Exchange gave rise to such claims. Nothing in this Rule shall obligate the Exchange to seek recovery under any applicable insurance policy.

Adopted July 8, 2019 (SR-MRX-2019-15).

(1) Notional dollar value per order (quantity x limit price x number of underlying shares);

(2) Daily aggregate notional dollar value;

(3) Quantity per order; and

(4) Daily aggregate quantity

(b) Members may elect one or more of the above optional risk protections by contacting Market Operations and providing a per order value (for (a)(1) and (a)(3)) or daily aggregate value (for (a)(2) and (a)(4)) for each order protection. Members may modify their settings through Market Operations.

(c) The System will reject all incoming aggregated Member orders for any of the (a)(2) and (a)(4) risk protections after the value configured by the Member is exceeded.

(d) The System will reject all incoming Member orders for any of the (a)(1) and (a)(3) risk protections upon arrival if the value configured by the Member is exceeded by the incoming order.

(e) If a Member sets a notional dollar value, a Market Order would not be accepted from that Member.

(f) The risk protections are only available for orders entered through FIX. Additionally, all settings are firm-level.

Adopted Dec. 9, 2019 (SR-MRX-2019-25); amended September 30, 2022 (SR-MRX-2022-18), operative November 7, 2022.